A New Photometric Study of Ap and Am Stars in the Infrared (2024)

In this paper, 426 well known confirmed Ap and Am stars are photometrically studied in the infrared. The 2MASS, Wide-field Infrared Survey Explorer (WISE), and IRAS data are employed to make analyses. The results in this paper have shown that in the 1–3 μm region over 90% Ap and Am stars have no or little infrared excesses, and infrared radiations in the near-infrared from these stars are probably dominated by the free–free emissions. It is also shown that in the 3–12 μm region, the majority of Ap stars and Am stars have very similar behavior, i.e., in the W1–W2 (3.4–4.6 μm) region, over half of Ap and Am stars have clear infrared excesses, which are possibly due to the binarity, the multiplicity, and/or the debris disk, but in the W2–W3 (4.6–12 μm) region they have no or little infrared excess. In addition, in the 12–22 μm region, some of Ap stars and Am stars show the infrared excesses and infrared radiations for these Ap and Am stars are probably due to the free–free emissions. In addition, it is seen that the probability of being the binarity, the multiplicity and/or the debris disk for Am stars is much higher than that for Ap stars. Furthermore, it can be seen that, in general, no relations can be found between infrared colors and spectral types either for Ap stars or for Am stars.

1.Introduction

Chemical peculiar (CP) stars are mainly found among B and A stars on the upper main sequence. Preston (1974) first used the term "Chemical Peculiar Star" (CP Star) for thesekinds of stars and gave the definition of CP stars as follows."The CP stars are identified by the presence of anomalously absorption lines of certain elements in their spectra." Hack (1981) further pointed out that the spectra of CP stars present an anomalous intensity of the lines of several elements, which can be interpreted as a surface phenomenon, an effect of an anonymous chemical composition of their atmospheres and not a consequence of the different evolutionary stage or membership in different populations. The important differences of CP stars defined by Preston (1974) with other "chemically peculiar stars," such as Ba II stars, R stars, S stars, and chemically peculiar late-type dwarfs is that the CP stars are on the upper main sequence, but other "chemically peculiar stars" are on the horizontal branch, the red giant branch or the asymptotic giant branch in the H-R diagram, and in consequence, the spectral types of CP stars are not later than F, but other "chemically peculiar stars" have more later spectral types.

CP stars can be classified into several subclasses according to Preston (1974) and Schnell (2008):

1.
CP1 = Am stars (the metallic line star) with the high binary frequency and without strong magnetic field;
2.
CP2 = Ap stars with strong magnetic field and the low binary frequency;
3.
CP3 = HgMn stars, most of them have no magnetic field;
4.
CP4 = He weak stars, some of them have detectable magnetic field.

Although many kinds of CP stars are discovered up to date (besides the stars above, λ Boo stars, etc., are also included), the number of Am and Ap stars is over 97% among all CP stars according to Renson & Manfroid (2009). Therefore, the study of Am and Ap stars are very important to understand the nature of CP stars.

At different times, Preston (1974), Hack (1981), Faraggiana (1987), Cowley & Bord (2004), and Schnell (2008) gave good reviews for the study of CP stars. In addition, Michaud et al. (2015) recently presented amore advanced review for CP stars in their book "Atomic Diffusion in Stars." Here we do not want to give the unnecessary descriptions and one can refer tothese references for more detail.

The earlier infrared study of CP stars can be dated back to 1978. The workshop named"Ap-stars in the infrared" held in 1978 summarized the early infrared study of Ap stars. In this workshop, some infrared observations of Ap stars, photometric properties of Am stars in the infrared, and angular diameters and effective temperatures of Ap stars were presented and discussed (Weiss & Kreidl 1979). Later,Groote & Kaufmann (1981) observed 82 Ap/Bp stars in JHKLM bands. They found that no infrared excesses can be found in the JHK bands. They also found, however, that60% of samples have the infrared excess in the M band (4.8 μm). They also declared that the infrared excess in the M band appears more frequently for earlier type stars and thatthere is a decrease of the maximum excess with the spectral type from B0 to F0. Groote & Kaufmann (1983) further observed 105 CP stars in JHKLM bands and confirmed infrared excess in the M band for many stars. Groote & Kaufmann (1984) also claimed that some CP stars even show slightly infrared excess in theL band (3.6 μm), but the reason of the infrared excess is still unknown. However, Bonsack & Dyck (1983) observed 22 CP stars and 18 normal (non-peculiar) comparison stars in JHKL'M bands. They found that for these two groups of stars infrared colors are similar. Kroll (1987) supported the conclusion from Bonsack & Dyck (1983) and agaist the conclusions from Groote & Kaufmann (1983, 1984), i.e., no infrared excess can be found for CP stars. Therefore, infrared observation is necessary for CP stars beyond 5 μm. Then, Kroll (1987) analyzed IRAS data for 40 CP stars and found that CP2 and CP3 stars have no infrared excess, but two CP4 stars show the circ*mstellar dust like Be stars. After the1990s,the infrared study of CP stars becamerare, only Shylaja & Ashok (2002) reported the observations of 22 Am stars in JHKLM and IRAS bands. They found that, in general, all Am stars have infrared excesses, and the 12 μm fluxes tend to have infrared excesses. They further pointed out that infrared excess for Am stars is possibly due to the circ*mstellar dust, and in 25/60μm may also be due to the free–free emission from the stellar wind. Recently Herdin et al. (2016) reported the 2MASS observation for rather large number of CP stars. They found that no differences in the astrophysical parameters derived from 2MASS are found between CP stars and normal (non-peculiar) stars.

Some information about infrared studies of CP stars since 1981has been summarized in Table 1.

Table 1.Information About the Infrared Studies of CP Stars Since 1981

Year	Authors	Number of stars	Observational bands	Main results
1981	Groote & Kaufmann	82	JHKLM	no IR excess in JHK bands, but IR excess in M band for 60% of thesample
1983	Groote & Kaufmann	105	JHKLM	confirmed IR excess in M band for many stars
1983	Bonsack & Dyck	22 CP+18 non-peculiar	JHKL'M	similar IR colors for CP stars and non-peculiar stars
1984	Groote & Kaufmann	105	JHKLM	slightIR excess in L band for some stars
1987	Kroll	17	JHKLM	no IR excess can be found
1987	Kroll	40	IRAS	no IR excess for CP2 and CP3 stars but two CP4 stars show IR excess
2002	Shylaja & Ashok	22	JHKLM and IRAS	all Am stars show IR excess
2016	Herdin et al.	622 best candidate CP+639 normal(non-peculair)	2MASS JHK	No differences in the astrophysical parameters can be found for both groups of stars

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Renson et al. (1991) published the first catalog of Ap and Am stars containing 6684 objects including probable and suspected ones. In 2009, Renson & Manfroid (2009) modified this catalog and published the General Catalog of Ap and Am stars in which 8205 known, probable and suspected Ap (3652), Am (4299), and HgMn (162) stars are included. As Renson & Manfroid (2009) described, in this catalog, the category "Ap star" is taken in the broadest sense. It also includes early Bp stars and late Bp stars. Similarly, it includes the Fm stars under the Am banner. However, as they claimed, only 426 samples are "well known confirmed Ap, Am,and HgMn stars," but they did not give any criteria for these "well known confirmed Ap, Am, and HgMn stars." These 426 samples include 180 Ap stars, 69 late Bp stars, 19 early Bp stars, 116 Am/Fm stars, and 42 HgMn stars.

It is noted that the infrared photometric study of Ap and Am stars should be reconsidered nowfor several reasons.(1) The number of stars studied in most previous works is quite small. Therefore, in order to obtain the reliably statistical result, the number of Ap and Am stars studied should be increased.(2) Recently, the new space mission, the Wide-field Infrared Survey Explorer (WISE) mission, has included the observational range of 3–22 μm,which covers the observational wavelength range just between the 2MASS and IRAS and includes the observation around 5 μm so that the photometric study of Ap and Am stars in the full infrared wavelengths from 1–60 μm can be made to further outline infrared properties for Ap and Am stars. It is also possible to clearly reveal whetherinfrared excesses around 5 μm for Ap and Am stars are real or not.

The WISE mission has completed theall sky survey in the mid-infrared (Wright et al. 2010). WISE performed observations in four bands: W1 (3.4 μm), W2 (4.6 μm), W3 (12 μm),and W4 (22 μm), and WISE all-sky data released in 2012 March 14. This survey extended the 2MASS All Sky Survey into the mid-infrared and connected with the far-infrared observation by IRAS.

In this paper, we use the General Catalog of Ap and Am and stars by Renson & Manfroid (2009) as our basic working sample to systematically study Ap and Am stars in the infrared based on 2MASS, WISE, and IRAS data. Note that, to avoid the possible wrong classification, the suspected and probable stars are not included, and only "well known confirmed stars" are studied in this paper.

In addition, some information about the wavelengths and widths in various infrared bands referred to in this paper are collected in Table 2 as the references.

Table 2.The Wavelength and Band Width in Units of μm for the Infrared Photometry Used in This Paper

Mission	2MASS			WISE				IRAS
Band	J	H	KS	W1	W2	W3	W4	12 μm	25 μm	60 μm
Wavelength	1.235	1.662	2.159	3.4	4.6	12	22	12	25	60
Band width	0.162	0.251	0.262	0.662	1.042	5.506	4.103	8.5–15	19–30	40–80

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2.Data Processing

In the General Catalog of Ap and Am stars (Renson & Manfroid 2009) 8265 stars are included in which, as Renson & Manfroid (2009) described, only 426 stars are of the"well known confirmed sample." We take these 426 stars as our working sample.

The cross-identifications of 2MASS/WISE counterparts for all Ap, Am, and HgMn stars listed in this paper are made from Cutri et al. (2012) by using the radius of 2 arcsec. All 426 Ap, Am, and HgMn stars have 2MASS and/or WISE counterparts,which are listed in Table 3. The contents in Table 3 are(1) the star number in this paper,(2) the star number from the General Catalog of Ap and Am stars (Renson & Manfroid 2009),(3) the star name (HD or others),(4) the star position in the epoch of 2000 from the General Catalog of Ap and Am stars,(5) the spectral types and CP star types of Am, Ap, and HgMn from Skiff (2009–), All-Sky Compiled Catalog of 2.5 million stars (ASCC) Kharchenko & Roeser (2009) or Renson & Manfroid (2009),(6) the Galactic extinction coefficient Av,(7) magnitudes with measurement uncertainties in 2MASS JHK bands, and if the empty is in the uncertainty, it means the upper limit value, and(8) magnitudes with measurement uncertainties in four WISE bands, and if the empty is in the uncertainty, it means the upper limit value.

Table 3.Infrared Propertis of Ap, Am, and HgMn Stars in This Paper

No.	RNo.	HD No.	R.A. (2000)	Decl. (2000)	SpType	CPType	Av	J	J_e	H	H_e	K	K_e	W1	W1_e	W2	W2_e	W3	W3_e	W4	W4_e
001	8182	224801	000043.63	+451512.0	B8VpSiEu	p	0.242	6.407	0.024	6.506	0.016	6.511	0.017	6.538	0.042	6.595	0.021	6.637	0.015	6.366	0.046
002	8198	225119	000337.10	−282501.7	B9.5IIIpSiCr	p	0.239	8.383	0.017	8.463	0.037	8.425	0.020	8.440	0.024	8.499	0.021	8.538	0.022	8.408	0.274
003	8205	225289	000506.15	+611850.3	B8IVHgMn	HgMn	0.202	5.848	0.023	5.925	0.032	5.933	0.027	5.946	0.051	5.904	0.024	6.050	0.015	6.094	0.049
004	7	358	000823.26	+290525.4	B8IIIMnHg	HgMn	0.332	2.128	0.231	2.286	0.158	2.223	0.238
005	16	861	001312.73	+620227.2	A3V	m	0.701	6.212	0.017	6.177	0.017	6.153	0.014	6.168	0.049	6.118	0.023	6.206	0.016	6.184	0.048
006	19	965	001404.06	−000200.1	A5pSrSi	p	0.936	8.144	0.019	8.116	0.024	8.093	0.020	8.053	0.022	8.113	0.020	8.119	0.021	7.666	0.193
007	50	1909	002312.61	−310208.8	B9IVMnHg	HgMn	0.118	6.635	0.019	6.645	0.020	6.656	0.017	6.612	0.039	6.674	0.021	6.735	0.015	6.730	0.063
008	64	2453	002828.57	+322615.9	A5VpSiSrCr	p	0.000	6.708	0.019	6.764	0.019	6.738	0.023	6.721	0.039	6.754	0.020	6.835	0.016	6.764	0.061
009	102	3473	003807.69	+512729.6	A2pSiMg	p	0.000	9.038	0.020	9.119	0.018	9.112	0.016	9.117	0.022	9.177	0.021	9.283	0.026	9.266	0.396
010	105	3580	003831.85	−201747.7	B6VpSi	p	0.093	6.947	0.018	7.010	0.046	7.019	0.020	7.035	0.032	7.083	0.020	7.129	0.017	6.945	0.072
011	114	3885	004118.31	−195145.9	B9VpSi	p	0.000	9.944	0.024	9.986	0.024	10.022	0.020	10.003	0.023	10.062	0.022	10.091	0.053	8.532
012	113	3883	004136.04	+243744.4	A5m	m	0.533	5.546	0.026	5.519	0.019	5.469	0.017	5.455	0.065	5.333	0.029	5.514	0.015	5.507	0.031
013	118	3980	004146.40	−563004.7	A3VpSrCr	p	0.697	5.586	0.018	5.584	0.024	5.567	0.028	5.607	0.066	5.471	0.029	5.654	0.010	5.542	0.033
014	129	4335	004610.81	+445141.4	B9.5IIIHgMn	HgMn	0.164	6.061	0.017	6.111	0.019	6.114	0.023	6.145	0.050	6.115	0.022	6.211	0.015	5.935	0.033
015	140	4778	005018.26	+450008.1	A0VpSiSrCrEu	p	0.254	6.086	0.020	6.151	0.020	6.136	0.017	6.133	0.046	6.104	0.021	6.205	0.014	6.168	0.039
016	146	BD+40 175	005109.99	+411152.7	ApSrCrEu	p	0.311	9.602	0.028	9.604	0.035	9.546	0.026	8.683	0.022	8.726	0.019	8.813	0.021	8.581	0.224
017	168	5737	005836.36	−292126.8	B7IIIp	p	0.040	4.847	0.259	4.808	0.075	4.669	0.037	4.648	0.084	4.353	0.046	4.778	0.014	4.724	0.026
018	172	5797	010033.44	+602640.9	A8IIICrEuSr	p	0.155	7.915	0.027	7.857	0.027	7.842	0.023	7.771	0.025	7.797	0.020	7.872	0.021	8.429	0.337
019	177	6116	010254.26	+412042.6	A7V	m	0.000	5.625	0.034	5.580	0.027	5.591	0.023	5.502	0.062	5.414	0.030	5.625	0.015	5.578	0.030
020	189	6532	010555.70	−264344.0	A2Vp	p	0.567	8.246	0.019	8.246	0.043	8.189	0.019	8.138	0.023	8.166	0.021	8.211	0.019	8.200	0.255
021	191	6619	010626.58	−353938.4	A1V	m	0.440	6.352	0.026	6.348	0.028	6.308	0.014	6.309	0.043	6.315	0.021	6.369	0.014	6.299	0.047
022	214	7374	011407.63	+160800.5	B8IIIHgMn	HgMn	0.189	6.065	0.024	6.210	0.028	6.212	0.016	6.251	0.043	6.219	0.020	6.320	0.015	6.165	0.049
023	234	8374	012340.62	+374253.8	A0Vm	m	1.042	5.059	0.017	4.993	0.017	4.967	0.017	4.999	0.075	4.658	0.041	5.020	0.015	4.969	0.025
024	237	8441	012418.68	+430831.5	A2VpSrSi	p	0.093	6.456	0.018	6.533	0.032	6.494	0.019	6.451	0.045	6.456	0.020	6.526	0.014	6.494	0.047
025	244	8801	012726.67	+410604.2	A7m	m	0.685	5.824	0.019	5.744	0.017	5.697	0.020	5.652	0.058	5.589	0.022	5.723	0.015	5.648	0.034
026	264	9393	013315.52	+435345.1	A1IIISiCrSr	p	0.000	8.741	0.039	8.809	0.029	8.838	0.021	8.866	0.023	8.917	0.020	8.956	0.030	8.579
027	286	9996	013831.82	+452358.9	A2IIp	p	0.000	6.342	0.017	6.396	0.041	6.429	0.024	6.453	0.041	6.470	0.020	6.529	0.015	6.383	0.041
028	294	10221	014220.53	+680234.9	A0VpSiSrHgMn	HgMn	0.000	5.624	0.018	5.701	0.030	5.691	0.019	5.687	0.056	5.641	0.027	5.743	0.015	5.275	0.030
029	311	10783	014542.53	+083333.3	A2IIIpSi	p	0.000	6.539	0.023	6.579	0.032	6.560	0.017	6.583	0.039	6.601	0.019	6.672	0.016	6.659	0.055
030	325	11187	015126.62	+545528.9	A0pSiCr	p	0.000	7.125	0.019	7.222	0.039	7.230	0.017	7.231	0.026	7.269	0.019	7.352	0.017	7.340	0.104
031	343	11502	015331.81	+191737.9	B9Vp	p	0.223	6.933		6.710		4.716	0.020	4.705	0.221	4.253	0.127	4.818	0.019	4.750	0.038
032	335	11408	015348.51	+553551.5	A5IIIm	m	0.214	6.131	0.023	6.085	0.024	6.072	0.017	6.062	0.052	6.025	0.023	6.117	0.011	6.048	0.041
033	336	11415	015423.73	+634012.4	B3IIIp	p	0.291	3.864	0.301	3.934	0.224	3.963	0.293	3.815	0.121	3.398	0.084	3.913	0.016	3.782	0.039
034	359	11905	015756.37	+414140.4	B8IIIHgMn	HgMn	0.245	6.803	0.020	6.880	0.017	6.875	0.024	6.869	0.035	6.917	0.020	6.989	0.015	6.844	0.064
035	367	12098	020040.18	+583137.1	F0Eu	p	0.310	7.686	0.067	7.645	0.048	7.585	0.030	7.705	0.034	7.731	0.031	7.748	0.030	7.912	0.302
036	377	12446	020202.82	+024549.5	A2Vp	p	0.000	3.750	0.263	3.579	0.230	3.615	0.331	3.646	0.122	3.177	0.059	3.766	0.015	3.736	0.022
037	378	12447	020202.70	+024549.7	A3Vm	m	0.682	3.750	0.263	3.579	0.230	3.615	0.331	3.646	0.122	3.177	0.059	3.766	0.015	3.736	0.022
038	372	12288	020330.51	+693456.4	A2VCrSi	p	0.301	7.425	0.024	7.399	0.037	7.429	0.023	7.423	0.027	7.477	0.020	7.513	0.018	7.568	0.123
039	386	12767	020429.44	−291748.5	A0IIIpSi	p	0.000	5.166	0.289	5.047	0.030	5.014	0.023	5.136	0.068	4.804	0.040	5.158	0.014	5.099	0.028
040	388	12869	020633.93	+223853.9	A1/2Vm	m	0.521	5.221	0.307	4.737	0.035	4.739	0.017	4.748	0.081	4.434	0.042	4.815	0.014	4.801	0.027
041	427	14392	022058.21	+500905.3	B8Vp	p	0.149	5.664	0.020	5.736	0.024	5.710	0.019	5.750	0.051	5.649	0.028	5.825	0.014	5.747	0.037
042	447	15144	022600.35	−152028.5	A5VpSrCr	p	0.093	5.696	0.023	5.678	0.030	5.635	0.016	4.998	0.056	5.282	0.028	5.639	0.014	5.582	0.031
043	446	15089	022903.95	+672408.9	A5IIIpSr	p	0.000	3.980	0.428	4.289	0.035	4.248	0.030	3.834	0.124	3.357	0.056	4.063	0.015	4.103	0.027
044	459	15385	022913.68	+232808.5	A6V	m	0.176	5.900	0.017	5.921	0.019	5.890	0.017	5.870	0.053	5.814	0.026	5.951	0.014	5.866	0.038
045	490	16545	024036.93	+440528.4	A0pSi	p	0.000	7.452	0.023	7.612	0.046	7.589	0.017	7.573	0.025	7.609	0.020	7.646	0.018	7.494	0.121
046	501	16727	024302.84	+550621.7	B7IIIp	p	0.130	5.918	0.023	6.019	0.027	6.050	0.020	6.096	0.048	6.089	0.022	6.167	0.015	5.993	0.043
047	534	18006	024640.20	−773115.6	A3m	m	0.908	8.210	0.028	8.081	0.046	8.041	0.024	7.974	0.023	7.994	0.021	7.997	0.017	8.119	0.138
048	535	18078	025632.01	+561041.5	A0pSrSi	p	0.884	7.710	0.018	7.732	0.019	7.675	0.019	7.680	0.024	7.710	0.021	7.743	0.018	7.914	0.196
049	542	18296	025717.28	+315603.2	B8VpSiSr	p	0.366	5.109	0.037	5.243	0.028	5.229	0.019	5.217	0.065	5.066	0.031	5.368	0.014	5.331	0.035
050	558	18769	030154.14	+262744.5	A2Vm	m	0.462	5.600	0.024	5.612	0.017	5.560	0.016	5.554	0.061	5.469	0.027	5.648	0.017	5.635	0.038
051	577	19400	030215.45	−715408.8	B8III/IVp	p	0.071	5.761	0.026	5.863	0.027	5.837	0.026	5.864	0.054	5.817	0.026	5.962	0.015	5.964	0.037
052	584	19832	031214.25	+271525.1	A0IVpSi	p	0.162	5.928	0.017	5.993	0.016	6.011	0.016	6.016	0.051	6.041	0.020	6.158	0.015	6.111	0.056
053	603	20320	031550.02	−084911.0	A7Vm	m	0.353	4.419	0.250	4.255	0.219	4.224	0.019	4.156	0.097	3.564	0.067	4.196	0.013	4.104	0.023
054	597	20210	031601.86	+344118.6	A2m	m	0.889	5.703	0.020	5.651	0.024	5.585	0.020	5.573	0.057	5.451	0.029	5.631	0.016	5.581	0.036
055	615	20629	031947.76	+190434.5	A0SiSrCr	p	0.006	7.493	0.024	7.558	0.032	7.532	0.023	7.553	0.026	7.590	0.021	7.669	0.017	7.456	0.125
056	643	21699	033208.60	+480124.5	B8IIIpSi	p	0.143	5.566	0.023	5.664	0.039	5.664	0.016	5.679	0.056	5.583	0.026	5.803	0.016	5.755	0.045
057	656	21933	033235.95	+092224.4	B8IIIHgMn	HgMn	0.257	5.809	0.020	5.894	0.028	5.881	0.017	5.879	0.048	5.858	0.025	5.985	0.015	5.783	0.039
058	679	22470	033617.41	−172801.4	B9VSi	p	0.000	5.459	0.018	5.563	0.048	5.526	0.024	5.540	0.061	5.379	0.028	5.657	0.015	5.662	0.037
059	673	22374	033658.02	+231239.8	A1IIIpCrSrSi	p	0.369	6.436	0.017	6.492	0.034	6.425	0.023	6.451	0.040	6.442	0.020	6.492	0.015	6.348	0.061
060	677	22401	033815.58	+473437.1	A0VCrSr	p	0.146	7.362	0.023	7.393	0.023	7.375	0.020	7.369	0.027	7.395	0.021	7.426	0.017	7.477	0.106
061	697	22920	034038.33	−051238.5	B9IIIpSi	p	0.000	5.764	0.017	5.790	0.024	5.872	0.016	5.934	0.051	5.834	0.023	5.999	0.014	5.979	0.048
062	727	23408	034549.61	+242203.9	B8IIIp	p	0.291	4.059	0.275	4.122	0.035	3.986	0.017	3.919	0.096	3.524	0.049	3.796	0.015	1.602	0.032
063	714	23277	034913.74	+705215.8	A2m	m	0.329	5.178	0.023	5.239	0.032	5.198	0.020	5.173	0.067	4.965	0.039	5.243	0.015	5.216	0.033
064	750	23950	034955.07	+221438.9	B9IV HgMnSi	HgMn	0.326	5.967	0.018	6.051	0.061	5.975	0.020	6.019	0.047	5.985	0.023	6.096	0.015	5.617	0.037
065	758	24155	035115.87	+130245.9	B9II-IIISi	p	0.214	6.316	0.029	6.355	0.035	6.390	0.023	6.441	0.041	6.438	0.020	6.507	0.015	6.532	0.063
066	780	24712	035516.13	−120556.8	A9IIIpSrEu	p	0.285	5.432	0.017	5.314	0.024	5.262	0.019	5.316	0.062	4.983	0.033	5.289	0.014	5.228	0.032
067	800	25267	035955.48	−240058.4	A0IIIpSi	p	0.000	4.828	0.026	4.973	0.101	4.802	0.026	4.830	0.071	4.581	0.037	4.954	0.014	4.933	0.028
068	804	25354	040310.86	+380317.3	A0pSi	p	0.326	7.778	0.019	7.864	0.026	7.823	0.024	7.830	0.024	7.865	0.021	7.870	0.018	7.989	0.169
069	822	25823	040636.41	+273559.7	A0IIpSrSi	p	0.102	5.361	0.032	5.407	0.030	5.433	0.019	5.424	0.062	5.325	0.030	5.475	0.014	4.681	0.028
070	807	25425	040638.84	+653114.9	A4Vm	m	0.205	5.849	0.026	5.834	0.020	5.783	0.017	5.788	0.054	5.683	0.027	5.814	0.014	5.733	0.035
071	847	26571	041251.24	+222448.4	B8IIIpSi	p	0.112	5.594	0.037	5.610	0.017	5.570	0.019	5.557	0.064	5.440	0.029	5.653	0.015	5.553	0.036
072	863	27045	041715.66	+203442.9	A7m	m	0.493	4.785	0.272	4.577	0.256	4.361	0.019	4.331	0.087	3.950	0.048	4.400	0.015	4.325	0.028
073	879	27295	041926.10	+210832.3	B9IVp	p	0.081	5.572	0.026	5.609	0.017	5.611	0.016	5.654	0.057	5.540	0.026	5.671	0.015	5.432	0.038
074	881	27309	041936.71	+214624.6	A0VpSi	p	0.000	5.517	0.027	5.605	0.019	5.636	0.017	5.789	0.060	5.645	0.028	5.821	0.010	5.633	0.038
075	882	27376	041753.66	−334754.1	B9VHgMn	HgMn	0.000	3.864	0.314	3.857	0.268	3.954	0.244	3.789	0.115	3.204	0.066	3.946	0.015	3.941	0.022
076	884	27411	041837.49	−225811.0	A3m	m	0.889	5.658	0.017	5.584	0.034	5.520	0.017	5.477	0.064	5.327	0.031	5.539	0.015	5.423	0.032
077	890	27628	042203.52	+140437.9	A9Vm	m	0.118	5.052	0.023	5.015	0.020	4.960	0.017	4.919	0.069	4.691	0.035	4.995	0.015	4.935	0.031
078	894	27749	042325.06	+164638.1	A7Vm	m	0.561	5.039	0.019	5.008	0.023	4.945	0.020	4.908	0.073	4.575	0.035	4.981	0.016	4.947	0.033
079	901	27962	042529.38	+175540.5	A1Vm	m	0.254	4.337	0.316	4.381	0.238	4.098	0.028	4.263	0.083	3.666	0.058	4.188	0.014	4.175	0.021
080	905	28226	042800.78	+213711.7	A8Vm	m	0.507	5.163	0.017	5.103	0.017	5.054	0.017	5.096	0.069	4.729	0.041	5.092	0.014	4.978	0.032
081	912	28355	042850.16	+130251.4	A7Vm	m	0.201	4.793	0.197	4.656	0.203	4.533	0.032	4.576	0.079	4.037	0.055	4.566	0.014	4.286	0.026
082	920	28546	043038.89	+154130.8	A1IV/Vm	m	0.034	5.458	0.241	4.967	0.035	4.902	0.023	4.885	0.072	4.612	0.038	4.954	0.014	4.915	0.027
083	925	28843	043237.55	−031234.3	B9IIIpSi	p	0.000	5.993	0.024	6.087	0.039	6.072	0.019	6.242	0.045	6.105	0.024	6.165	0.014	6.039	0.043
084	929	29009	043354.73	−064420.1	ApSi	p	0.000	5.887	0.020	5.966	0.023	5.969	0.017	5.983	0.049	5.956	0.023	6.069	0.015	6.066	0.043
085	936	29305	043359.78	−550241.9	A0IIIpSi	p	0.524	3.503	0.209	3.466	0.189	3.572	0.286	3.471	0.126	2.906	0.052	3.566	0.011	3.540	0.018
086	932	29140	043539.26	+100938.8	A7Vm	m	0.130	3.701	0.228	3.882	0.035	3.693	0.247	3.768	0.101	3.096	0.069	3.809	0.015	3.772	0.025
087	943	29499	043906.16	+075215.5	A7Vm	m	0.434	5.179	0.254	4.927	0.028	4.808	0.019	4.802	0.076	4.395	0.034	4.841	0.015	4.817	0.027
088	942	29479	043909.22	+154759.4	A5Vm	m	0.084	4.822	0.017	4.855	0.035	4.804	0.024	4.803	0.073	4.511	0.040	4.867	0.015	4.861	0.031
089	970	30210	044601.74	+114220.1	A7Vm	m	0.198	4.995	0.017	5.022	0.030	4.973	0.019	4.942	0.070	4.564	0.046	5.005	0.015	4.984	0.030
090	967	30121	044800.28	+564526.0	A8IVbm	m	0.205	5.107	0.239	4.769	0.039	4.724	0.016	4.732	0.076	4.302	0.043	4.760	0.015	4.720	0.024
091	992	30849	044838.52	−491011.9	A5pSrEuSr	p	0.260	8.531	0.019	8.581	0.035	8.503	0.018	8.489	0.022	8.526	0.020	8.520	0.018	8.652	0.195
092	979	30466	044916.00	+293416.9	A0pSi	p	0.456	6.861	0.023	6.881	0.017	6.810	0.028	6.861	0.030	6.867	0.021	6.558	0.016	5.580	0.043
093	978	30453	044919.08	+323517.5	A4m	m	0.184	5.317	0.018	5.256	0.014	5.204	0.016	5.236	0.063	4.976	0.030	5.285	0.013	5.232	0.032
094	1048	32549	050434.15	+152414.8	A0IVpSiCr	p	0.118	6.692		6.564		4.737	0.023	4.704	0.070	4.369	0.026	4.771	0.014	4.689	0.025
095	1044	32428	050436.92	+321913.0	A8.5Vm:	m	0.164	6.048	0.027	5.954	0.030	5.934	0.019	5.883	0.053	5.835	0.022	5.949	0.016	5.938	0.043
096	1054	32633	050608.36	+335507.3	B9IbpSiCr	p	0.298	6.998	0.032	7.027	0.052	7.057	0.020	7.084	0.031	7.116	0.020	7.216	0.017	7.245	0.107
097	1063	32964	050645.65	−043918.6	B9HgMn	HgMn	0.127	5.228	0.037	5.221	0.019	5.203	0.023	5.212	0.067	4.986	0.034	5.279	0.015	5.192	0.030
098	1074	33254	050919.64	+094946.5	A8IVm	m	0.087	4.965	0.026	4.928	0.023	4.861	0.023	4.882	0.076	4.651	0.045	4.933	0.013	4.909	0.029
099	1072	33204	050945.09	+280149.7	A9Vm	m	0.031	5.545	0.018	5.484	0.019	5.427	0.016	5.157	0.081	4.349	0.021	5.257	0.015	5.325	0.033
100	1057	32650	051222.46	+735648.0	A0VpSi	p	0.000	5.551	0.019	5.646	0.016	5.640	0.020	5.581	0.066	5.551	0.027	5.679	0.013	5.654	0.034
101	1101	33904	051255.90	−161219.7	B9IVMnHg	HgMn	0.019	3.463	0.246	3.469	0.233	3.523	0.236	3.516	0.118	2.880	0.059	3.649	0.015	3.629	0.023
102	1084	33641	051325.72	+382904.2	A7IVbm	m	0.248	4.375	0.194	4.388	0.035	4.395	0.030	4.426	0.082	3.847	0.056	4.433	0.016	4.414	0.026
103	1117	34364	051818.90	+334602.5	B9.5VHgMn	HgMn	0.099	6.190	0.018	6.254	0.017	6.264	0.023	6.277	0.047	6.261	0.021	6.361	0.017	6.440	0.089
104	1125	34452	051900.03	+334454.2	B9VpSi	p	0.000	5.627	0.032	5.745	0.034	5.756	0.024	5.877	0.048	5.736	0.026	5.952	0.015	6.021	0.069
105	1149	34797	051918.31	−183034.4	B8IVpSi	p	0.109	6.695	0.020	6.797	0.052	6.768	0.023	6.764	0.031	6.805	0.020	6.867	0.015	6.601	0.052
106	1171	35035	052301.42	+282808.0	A3m	m	0.796	6.994	0.027	6.952	0.020	6.894	0.026	6.892	0.034	6.872	0.020	6.937	0.017	6.876	0.087
107	1220	35456	052440.38	−022952.3	B8IVp	p	0.183	6.954	0.028	7.013	0.032	6.986	0.019	6.972	0.035	7.011	0.021	7.076	0.016	6.977	0.088
108	1229	35497	052617.51	+283627.1	B7IIIpCr	p	0.223	1.855	0.233	1.881	0.192	2.003	0.244	2.385	0.320	2.083	0.007	1.940	0.010	2.028	0.013
109	1230	35502	052501.20	−024855.7	B5IVpSrCrSi	p	0.422	7.388	0.023	7.421	0.054	7.427	0.017	7.422	0.026	7.453	0.019	7.420	0.016	7.247	0.099
110	1238	35548	052531.08	−003238.2	B9IIIHgMn	HgMn	0.242	6.576	0.018	6.644	0.037	6.600	0.020	6.614	0.039	6.626	0.021	6.679	0.015	6.602	0.064
111	1284	36060	052705.32	−405636.6	A5m	m	0.415	5.447	0.017	5.412	0.027	5.352	0.026	5.319	0.066	5.128	0.031	5.372	0.014	5.357	0.028
112	1336	36485	053200.40	−001704.5	B2Vp	p	0.186	7.164	0.026	7.234	0.027	7.282	0.023	7.337	0.027	7.359	0.020	7.389	0.019	7.427	0.165
113	1396	36916	053453.96	−040637.5	B8IIIpSi	p	0.022	6.901	0.024	6.978	0.043	7.026	0.026	7.065	0.033	7.094	0.021	7.203	0.024	7.348	0.150
114	1414	37017	053521.87	−042939.0	B2Vp	p	0.251	6.796	0.024	6.879	0.050	6.913	0.027	6.907	0.038	6.978	0.021	6.801	0.020	6.814	0.127
115	1420	37043	053526.45	−055444.5	B3Vp	p	/	7.493	0.017	7.604	0.037	7.704	0.028
116	1421	37058	053533.35	−045015.2	B3VpSr	p	0.260	7.602	0.019	7.729	0.071	7.748	0.028	7.779	0.026	7.816	0.024	6.917	0.034	2.854	0.064
117	1477	37479	053847.20	−023540.5	B2Vp	p	0.446	6.973	0.026	6.953	0.030	6.952	0.028	6.921	0.032	6.899	0.022	6.658	0.025	4.055	0.146
118	1498	37776	054056.37	−013025.9	B2IVp	p	0.301	7.287	0.027	7.423	0.039	7.414	0.024	7.419	0.026	7.454	0.020	6.203	0.019	2.485	0.038
119	1497	37752	054154.76	+231934.4	B7IIIp	p	0.453	6.631	0.017	6.695	0.014	6.709	0.017	6.692	0.033	6.765	0.020	6.821	0.016	6.540	0.065
120	1527	38104	054554.04	+494934.5	A1IVpCr	p	0.236	5.317	0.023	5.348	0.024	5.314	0.019	5.331	0.062	5.178	0.034	5.384	0.015	5.360	0.031
121	1573	38478	054645.50	+154921.0	B8IIIHgMn	HgMn	0.229	6.061	0.026	6.093	0.016	6.127	0.017	6.115	0.049	6.134	0.021	6.208	0.015	6.084	0.048
122	1618	38823	054825.50	−004534.6	A5pSr	p	0.668	6.935	0.017	6.945	0.057	6.887	0.017	6.836	0.036	6.875	0.018	6.872	0.015	6.661	0.059
123	1677	39317	055222.29	+141018.4	A0VpSiSrCr	p	0.000	5.578	0.018	5.605	0.016	5.574	0.016	5.543	0.060	5.455	0.027	5.577	0.017	5.182	0.035
124	1788	40536	055904.31	−093329.7	A6IIIm	m	0.208	4.776	0.037	4.723	0.054	4.624	0.024	4.707	0.080	4.259	0.051	4.668	0.015	4.600	0.024
125	1766	40312	055943.27	+371245.3	A0IIIpSi	p	0.071	2.384	0.247	2.391	0.211	2.397	0.296	3.119	0.118	2.146	0.079	2.595	0.006	2.804	0.014
126	1774	40394	060058.56	+475406.9	A1VpSi	p	0.081	5.540	0.019	5.590	0.020	5.581	0.023	5.589	0.055	5.438	0.029	5.654	0.014	5.573	0.036
127	1835	40932	060223.00	+093850.2	A4Vm	m	0.223	3.730	0.307	3.598	0.275	3.637	0.259	3.737	0.173	3.122	0.095	3.822	0.023	3.716	0.047
128	1868	41269	060533.90	+333556.6	B9VpSrCr	p	0.037	6.255	0.024	6.314	0.035	6.328	0.016	6.302	0.044	6.334	0.021	6.385	0.015	6.156	0.045
129	1874	41357	060635.10	+382857.5	A7IVm	m	0.446	5.085	0.231	4.939	0.214	4.756	0.016	4.845	0.081	4.448	0.044	4.794	0.015	4.772	0.023
130	1938	42078	060641.04	−421755.7	A2m	m	0.753	5.750	0.024	5.659	0.032	5.576	0.023	5.550	0.063	5.439	0.030	5.634	0.016	5.604	0.033
131	1976	42675	061212.29	+044025.5	A0pSi	p	0.260	7.522	0.029	7.583	0.046	7.557	0.028	7.525	0.024	7.560	0.018	7.650	0.018	7.646	0.156
132	1973	42616	061343.15	+414150.1	A1pSrSi	p	0.620	6.823	0.027	6.859	0.048	6.842	0.017	6.817	0.032	6.855	0.021	6.882	0.015	6.656	0.064
133	1995	43478	061751.51	+323016.6	F2m	m	0.766	6.705	0.020	6.580	0.019	6.506	0.024	6.506	0.039	6.505	0.021	6.544	0.016	6.510	0.063
134	2005	43819	061901.84	+171930.9	B9IVpSi	p	0.043	6.368	0.034	6.414	0.017	6.414	0.016	6.382	0.044	6.469	0.022	6.543	0.017	6.426	0.061
135	2035	44691	062625.84	+561706.3	A7m	m	0.313	5.471	0.289	5.065	0.019	4.993	0.016	4.982	0.083	4.739	0.038	5.033	0.014	4.977	0.029
136	2104	46052	063227.18	+322717.6	A4Vm	m	0.226	5.498	0.020	5.499	0.026	5.480	0.020	5.615	0.057	5.346	0.030	5.578	0.015	5.282	0.036
137	2154	47152	063823.01	+285903.7	A0VEuSr	p	0.326	5.729	0.034	5.791	0.020	5.785	0.019	5.748	0.057	5.720	0.027	5.837	0.020	5.802	0.052
138	2233	49333	064701.48	−210055.4	B7IIIpSi	p	0.000	6.357	0.024	6.447	0.054	6.456	0.020	6.463	0.041	6.518	0.020	6.604	0.016	6.496	0.050
139	2230	264111	064753.86	+044000.9	B1.5Vp	p	0.992	9.532	0.020	9.602	0.023	9.588	0.021	9.575	0.022	9.646	0.021	9.850	0.077	8.327
140	2246	49606	064949.84	+161210.4	B8IIIMnHgSi	HgMn	0.089	6.034	0.019	6.135	0.016	6.150	0.017	6.178	0.047	6.199	0.021	6.265	0.015	6.200	0.051
141	2263	49976	065042.30	−080227.6	A1VSrCrEu	p	0.372	6.244	0.026	6.270	0.050	6.230	0.019	6.233	0.047	6.258	0.020	6.330	0.015	6.237	0.049
142	2282	50169	065159.23	−013840.4	A2pSrCrEu	p	0.217	8.901	0.027	8.944	0.021	8.920	0.020	8.891	0.024	8.943	0.019	9.063	0.046	8.941
143	2313	50643	065321.84	−185558.2	A3IIIm	m	0.443	5.818	0.017	5.785	0.037	5.748	0.017	5.730	0.057	5.698	0.029	5.796	0.015	5.773	0.036
144	2353	51418	065920.13	+421853.1	A0IIIpSi	p	0.549	6.568	0.027	6.656	0.057	6.605	0.019	6.634	0.038	6.676	0.021	6.722	0.016	6.686	0.071
145	2365	51688	065927.93	+255451.0	B8IVSi	p	0.078	6.544	0.028	6.625	0.017	6.635	0.027	6.671	0.040	6.716	0.019	6.797	0.018	6.875	0.093
146	2452	54118	070418.33	−564459.0	A0Si	p	0.043	5.258	0.017	5.321	0.024	5.291	0.019	5.288	0.067	5.100	0.034	5.383	0.014	5.347	0.030
147	2447	53929	070706.47	+045438.1	B9IIIp	p	0.000	6.308	0.019	6.373	0.034	6.368	0.017	6.310	0.043	6.417	0.021	6.483	0.015	6.405	0.055
148	2492	55719	071215.81	−402955.7	A3V?pSr	p	0.195	5.189	0.017	5.196	0.026	5.139	0.017	5.115	0.067	4.893	0.034	5.207	0.015	5.139	0.030
149	2522	56455	071446.02	−465058.8	A0VpSi	p	0.000	5.889	0.018	5.949	0.030	5.953	0.020	6.008	0.052	5.980	0.023	6.083	0.015	6.051	0.034
150	2601	58661	072851.48	+481102.1	B9IIISrHgMn	HgMn	0.062	5.842	0.037	5.916	0.043	5.892	0.020	5.949	0.040	5.913	0.022	6.030	0.015	5.950	0.041
151	2627	59435	072935.50	−091533.1	A6IIIpSrCrEu	p	1.032	6.828	0.028	6.506	0.034	6.387	0.023	6.319	0.042	6.411	0.022	6.374	0.015	6.310	0.049
152	2661	60435	073056.99	−575928.2	A3pSrEu	p	0.660	8.434	0.024	8.392	0.028	8.369	0.027	8.424	0.028	8.459	0.026	8.594	0.032	8.149	0.234
153	2663	60489	073446.21	+024331.8	A7IIISi	P	0.152	6.057	0.019	5.954	0.041	5.905	0.024	5.981	0.054	5.779	0.026	5.928	0.015	5.901	0.043
154	2724	62140	074627.41	+624949.9	A7VpSrCrEuSi	p	0.277	6.155	0.023	6.184	0.023	6.171	0.019	6.127	0.048	6.116	0.021	6.188	0.015	6.124	0.043
155	2789	63589	075102.36	+331401.2	A2Vm	m	0.533	5.731	0.018	5.731	0.017	5.684	0.020	5.653	0.060	5.598	0.028	5.760	0.014	5.719	0.039
156	2821	64740	075303.63	−493647.0	B2Vp	p	0.037	5.150	0.024	5.346	0.017	5.268	0.019	5.361	0.065	5.221	0.033	5.483	0.014	5.417	0.025
157	2872	65987	075802.91	−603653.2	A0IVpSiSr	p	0.143	7.647	0.019	7.729	0.035	7.697	0.019	7.639	0.024	7.699	0.020	7.766	0.018	7.797	0.113
158	2890	66318	075927.46	−604747.2	A0pEuSrCr	p	0.372	9.460	0.026	9.470	0.023	9.395	0.020	9.381	0.023	9.410	0.020	9.500	0.028	9.430	0.425
159	2884	66255	080028.96	−485218.4	A0IbSi	p	0.369	6.222	0.019	6.264	0.046	6.263	0.037	6.296	0.046	6.285	0.021	6.348	0.015	6.212	0.045
160	2845	65339	080142.45	+601927.7	A8IpSiSrCr	p	0.000	5.785	0.020	5.772	0.024	5.772	0.027	5.728	0.056	5.677	0.027	5.818	0.014	5.751	0.038
161	2901	66605	080227.09	−444001.0	A0pSi	p	0.084	6.502	0.023	6.515	0.028	6.493	0.019	6.470	0.041	6.539	0.020	6.598	0.015	6.605	0.049
162	2879	66068	080435.96	+534042.7	A2m	m	1.038	6.412	0.024	6.317	0.024	6.260	0.019	6.195	0.048	6.211	0.021	6.269	0.015	6.285	0.049
163	2934	67523	080732.65	−241815.6	F5IVm	m	0.526	2.171	0.316	2.084	0.208	2.022	0.254	2.108	0.445	1.688	0.016	1.661	0.006	1.786	0.011
164	2924	67317	081012.56	+554815.6	A2m	m	0.911	6.861	0.019	6.743	0.016	6.703	0.017	6.670	0.041	6.693	0.022	6.715	0.016	6.651	0.056
165	2964	68351	081308.87	+293923.5	A0VpSiCr	p	0.202	5.617	0.020	5.651	0.017	5.647	0.020	5.646	0.056	5.534	0.030	5.740	0.016	5.668	0.039
166	3027	70331	081917.34	−480409.9	B8II/IIIp:Si:	p	0.298	8.996	0.027	9.079	0.025	9.065	0.020	9.082	0.024	9.150	0.019	9.000	0.023	8.091	0.148
167	3061	71267	082555.59	−145546.8	A7Vm	m	0.181	5.625	0.018	5.566	0.024	5.527	0.023	5.486	0.060	5.343	0.029	5.575	0.015	5.560	0.032
168	3082	71866	083110.64	+401329.6	A2VpSrSi	p	0.319	6.616	0.020	6.712	0.020	6.665	0.016	6.656	0.037	6.707	0.020	6.698	0.016	6.379	0.057
169	3087	72037	083436.12	+650842.6	A0Vm	m	0.818	5.044	0.037	5.019	0.026	4.934		5.091	0.067	4.696	0.034	5.059	0.014	5.016	0.028
170	3128	72968	083528.20	−075856.3	A1VpSrCr	p	0.011	5.708	0.028	5.754	0.039	5.690	0.017	5.700	0.061	5.608	0.028	5.805	0.015	5.782	0.041
171	3143	73340	083552.03	−505810.7	A0pSi:	p	0.000	6.019	0.027	6.033	0.030	6.041	0.017	6.022	0.051	6.021	0.024	6.124	0.016	6.168	0.055
172	3083	71973	083648.74	+744325.2	A2m	m	1.057	5.708	0.027	5.592	0.017	5.563	0.017	5.559	0.056	5.396	0.033	5.559	0.014	5.546	0.030
173	3140	73174	083737.00	+194358.5	A2IV/Vm	m	0.000	7.369	0.026	7.311	0.027	7.288	0.019	7.248	0.030	7.260	0.020	7.313	0.019	7.004	0.163
174	3182	74169	083959.36	−531539.4	A0IV:pSiSrCr	p	0.118	7.211	0.020	7.254	0.035	7.159	0.020	7.125	0.033	7.169	0.021	7.190	0.016	7.187	0.097
175	3170	73818	084056.94	+195605.5	A2m	m	1.073	8.126	0.019	8.076	0.030	8.050	0.023	7.976	0.022	8.008	0.021	8.037	0.028	8.239	0.398
176	3198	74535	084218.99	−530600.2	B9IIISi	p	0.000	5.743	0.019	5.807	0.037	5.809	0.019	5.795	0.045	5.731	0.023	5.929	0.016	5.999	0.056
177	3196	74521	084445.04	+100454.0	A4IIIpSi	p	0.000	5.724	0.023	5.793	0.046	5.820	0.019	5.865	0.055	5.797	0.027	5.987	0.015	5.944	0.043
178	3237	75333	084921.73	−032634.9	B8VHgMn	HgMn	0.133	5.447	0.026	5.447	0.037	5.435	0.023	5.462	0.061	5.332	0.029	5.552	0.014	5.529	0.037
179	3252	75737	085134.41	−071038.0	A2/3Vm	m	0.381	5.280	0.017	5.270	0.034	5.191	0.023	5.177	0.065	4.948	0.033	5.223	0.014	5.199	0.033
180	3305	76756	085829.22	+115127.7	A5Vm	m	0.112	3.979	0.252	4.026	0.192	3.944	0.273	3.689	0.107	3.154	0.068	3.955	0.015	3.935	0.023
181	3334	77350	090244.27	+242710.5	B9VSrHgMn	HgMn	0.164	5.467	0.061	5.526	0.023	5.486	0.016	5.497	0.057	5.304	0.031	5.599	0.015	5.507	0.038
182	3368	78316	090744.81	+104005.5	B8IIIHgMn	HgMn	0.167	5.418	0.028	5.443	0.037	5.462	0.023	5.412	0.064	5.321	0.033	5.585	0.016	5.561	0.039
183	3367	78209	090852.27	+513616.8	F0IVm	m	0.327	4.146	0.284	4.038	0.236	4.041	0.280	3.787	0.102	3.187	0.075	3.899	0.014	3.859	0.024
184	3370	78362	091055.06	+633049.1	A3/4IIIm	m	0.321	4.068	0.244	3.933	0.216	3.963	0.289	3.936	0.098	3.510	0.062	3.952	0.014	3.918	0.019
185	3405	79193	091226.04	−070635.4	A1Vm	m	0.797	5.653	0.023	5.631	0.039	5.544	0.020	5.535	0.062	5.428	0.028	5.597	0.015	5.559	0.036
186	3403	79158	091348.21	+431304.2	B9IIIpSi	p	0.000	5.408	0.020	5.526	0.017	5.531	0.016	5.577	0.063	5.457	0.026	5.687	0.015	5.616	0.037
187	3445	80316	091825.03	−202216.2	A3SrEu	p	0.732	7.538	0.018	7.546	0.024	7.550	0.020	7.510	0.027	7.548	0.020	7.563	0.017	7.552	0.127
188	3461	81009	092250.86	−095019.7	A3VpSiSrCr	p	0.701	6.217	0.020	6.236	0.030	6.151	0.016	6.089	0.049	6.123	0.021	6.207	0.016	6.212	0.048
189	3552	83368	093625.41	−484504.2	A8VpSrCrEu	p	0.273	5.736	0.023	5.659	0.032	5.589	0.017	5.523	0.059	5.353	0.030	5.557	0.015	5.483	0.034
190	3664	86592	095914.26	−124513.8	A0pSrEu	p	1.054	7.658	0.019	7.735	0.052	7.662	0.026	7.618	0.024	7.674	0.020	7.689	0.019	7.899	0.217
191	3723	88182	100956.49	−120543.1	A5IIIm	m	0.223	5.919	0.017	5.928	0.034	5.853	0.024	5.826	0.056	5.756	0.026	5.899	0.015	5.869	0.042
192	3744	88981	101330.63	−662222.1	A7m	m	0.260	4.763	0.037	4.730	0.034	4.640	0.027	4.622	0.082	4.202	0.048	4.640	0.015	4.608	0.022
193	3741	88849	101750.55	+710338.5	A8IIIm	m	0.462	6.104	0.029	6.013	0.017	5.955	0.017	5.688	0.050	5.788	0.023	5.951	0.014	5.861	0.035
194	3749	89069	102116.04	+784551.4	A0pCrSrEu	p	0.248	8.303	0.027	8.321	0.024	8.371	0.026	8.232	0.022	8.271	0.021	8.317	0.018	8.183	0.161
195	3793	90044	102326.48	−040426.5	A2:IVpSiCrSr	p	0.000	5.980	0.017	6.100	0.048	6.072	0.016	5.999	0.049	6.024	0.024	6.144	0.015	6.017	0.046
196	3781	89822	102407.85	+653359.1	A1:VpSiSr	p	0.000	4.961	0.037	5.002	0.019	4.998	0.017	5.032	0.068	4.744	0.032	5.072	0.014	5.067	0.028
197	3809	90569	102738.99	+094544.6	A0IV/VpSiCr	p	0.183	6.024	0.020	6.080	0.039	6.038	0.023	6.014	0.051	6.019	0.023	6.117	0.016	6.109	0.066
198	3891	92664	104011.44	−650600.8	A0III/IVpSi	p	0.000	5.789	0.024	5.867	0.037	5.875	0.023	5.872	0.054	5.840	0.024	5.974	0.015	5.852	0.030
199	3923	93507	104550.63	−680749.6	A0pSiCr	p	0.220	8.309	0.028	8.359	0.050	8.319	0.032	8.324	0.023	8.377	0.020	8.448	0.022	8.303	0.157
200	3940	93903	105018.06	−085351.9	A3Vm	m	0.434	5.465	0.018	5.427	0.041	5.340	0.017	5.376	0.062	5.126	0.034	5.390	0.015	5.366	0.031
201	3949	94427	105356.72	−122604.4	A5pSrCrEu	p	0.756	6.717	0.020	6.620	0.023	6.553	0.023	6.535	0.038	6.524	0.020	6.567	0.016	6.586	0.067
202	3955	94660	105501.00	−421504.0	A0pSi	p	0.000	6.139	0.027	6.159	0.039	6.131	0.027	6.121	0.052	6.140	0.023	6.242	0.015	6.216	0.051
203	3971	95256	110105.66	+632516.0	A2Vm	m	0.567	6.076	0.023	6.072	0.027	6.081		5.970	0.051	5.938	0.025	6.045	0.015	6.078	0.040
204	4012	96446	110605.82	−595659.6	B2Vp	p	0.264	7.004	0.026	7.089	0.034	7.155	0.030	7.111	0.028	7.190	0.020	7.294	0.021	7.224	0.113
205	4021	96616	110716.69	−423819.3	A2IIIpSrSi	p	0.081	4.993	0.037	5.004	0.026	4.964	0.016	4.948	0.086	4.675	0.041	5.029	0.015	4.987	0.028
206	4017	96528	110739.71	+231925.5	A5Vm	m	0.214	6.084	0.017	6.084	0.020	6.021	0.017	5.940	0.051	5.936	0.022	6.048	0.014	6.019	0.042
207	4024	96707	110939.79	+671236.7	A7IVpSr	p	0.171	5.573	0.024	5.533	0.019	5.494	0.019	5.478	0.062	5.344	0.030	5.537	0.014	5.479	0.028
208	4071	98088	111658.18	−070804.9	A8IVpSrCrSi	p	0.000	5.778	0.020	5.729	0.026	5.689	0.026	5.684	0.060	5.665	0.028	5.788	0.014	5.696	0.042
209	4114	99620	112811.48	+554005.4	A3m	m	0.598	7.230	0.023	7.137	0.030	7.111	0.024	7.047	0.032	7.085	0.020	7.111	0.016	7.082	0.081
210	4124	99859	112943.56	+564415.3	A5Vm	m	0.155	5.969	0.019	5.967	0.028	5.933	0.020	5.865	0.058	5.794	0.023	5.942	0.015	5.913	0.042
211	4141	100518	113409.95	+110125.9	A5Vm	m	0.198	6.153	0.018	6.024	0.023	5.986	0.019	5.978	0.052	5.900	0.023	6.041	0.014	6.046	0.051
212	4166	101065	113737.04	−464234.9	F0?V?p	p	1.367	7.110	0.018	6.942	0.024	6.919	0.023	6.870	0.034	6.892	0.019	6.887	0.015	6.827	0.059
213	4169	101189	113807.30	−614935.6	A0IVCrY	p	0.202	5.172	0.037	5.236	0.072	5.125	0.020	5.134	0.074	4.856	0.038	5.258	0.011	5.194	0.032
214	4224	102660	114914.79	+161434.4	A2m	m	0.893	5.493	0.018	5.451	0.030	5.348	0.017	5.383	0.059	5.223	0.029	5.426	0.014	5.347	0.034
215	4235	102910	115055.34	+121644.5	A5m	m	0.211	5.802	0.024	5.750	0.019	5.711	0.024	5.583	0.056	5.511	0.027	5.747	0.013	5.670	0.038
216	4347	106251	121325.94	+101544.4	A3m	m	0.753	5.405	0.020	5.324	0.039	5.236	0.017	5.253	0.063	5.032	0.029	5.264	0.014	4.989	0.032
217	4359	106625	121548.37	−173230.9	B8VHgMn	HgMn	0.161	2.848	0.287	2.974	0.219	2.944	0.275	2.825	0.202	2.220	0.051	2.887	0.010	2.829	0.018
218	4378	107168	121919.19	+230204.8	A5IIIm	m	1.153	5.947	0.020	5.968	0.020	5.907	0.019	5.893	0.047	5.792	0.025	5.953	0.015	5.923	0.041
219	4394	107612	122202.07	+164441.0	A3IIIpSr	p	0.093	6.534	0.027	6.570	0.034	6.587	0.023	6.527	0.038	6.556	0.020	6.614	0.014	6.617	0.065
220	4429	108486	122738.37	+255443.6	A5IIm	m	0.192	6.284	0.023	6.222	0.027	6.225	0.017	6.306	0.048	6.204	0.022	6.289	0.015	6.333	0.049
221	4432	108642	122838.15	+261337.1	A7IIIm	m	0.336	6.137	0.052	6.021	0.028	5.993	0.017	5.980	0.048	5.934	0.024	6.031	0.013	6.023	0.050
222	4433	108651	122844.57	+255357.6	A7/9Vm	m	0.200	6.164	0.026	6.099	0.024	6.056	0.023	6.103	0.057	6.043	0.030	6.122	0.018	6.066	0.042
223	4434	108662	122854.70	+255446.3	A0IVpCrSrEu	p	0.081	5.221	0.019	5.296	0.034	5.289	0.017	5.305	0.069	5.135	0.034	5.395	0.015	5.337	0.030
224	4439	108945	123100.56	+243401.8	A3IIIpSr	p	0.118	5.293	0.037	5.308	0.027	5.269	0.017	5.262	0.063	5.069	0.032	5.333	0.014	5.220	0.031
225	4457	109510	123506.36	+182237.4	A9Vm	m	0.239	6.041	0.023	5.960	0.019	5.933	0.017	5.647	0.404	5.972	0.047	6.151	0.018	7.055	0.090
226	4463	109762	123702.91	+330135.6	A0Vm	m	1.289	7.962	0.023	7.913	0.020	7.907	0.013	7.783	0.024	7.863	0.021	7.858	0.018	7.671	0.137
227	4479	110066	123916.86	+355707.1	A1VpCrSrEu	p	0.347	6.288	0.024	6.331	0.023	6.330	0.023	6.276	0.044	6.335	0.020	6.414	0.014	6.296	0.049
228	4481	110073	123952.53	−395914.3	B8.5IV	p	0.158	4.880	0.037	4.902	0.075	4.784	0.017	4.761	0.081	4.505	0.042	4.887	0.014	4.802	0.026
229	4490	110326	124107.76	+302613.6	A6Vm	m	0.539	6.276	0.020	6.168	0.017	6.131	0.019	6.130	0.047	6.073	0.022	6.129	0.015	5.975	0.039
230	4508	110951	124537.04	+074024.1	A2IIIm	m	0.344	4.797	0.203	4.611	0.075	4.466	0.019	4.399	0.095	4.053	0.029	4.486	0.015	4.431	0.024
231	4509	CPD-55 5216	124624.19	−563010.1	A3VpCr	p	/	8.385	0.027	8.343	0.054	8.328	0.048	8.227	0.023	8.265	0.020	8.329	0.019	7.845	0.108
232	4516	111133	124702.31	+055701.3	A0VspSrCrEu	p	0.056	6.278	0.019	6.337	0.046	6.326	0.017	6.294	0.046	6.339	0.021	6.398	0.016	6.358	0.053
233	4547	112185	125401.75	+555735.4	A1VpCrEu	p	0.167	1.713	0.246	1.697	0.186	1.625	0.266	2.391	0.247	1.948	0.016	1.850	0.008	1.677	0.008
234	4556	112413	125601.69	+381905.9	A0VpSiEu	p	0.000	3.055	0.217	3.131	0.186	3.144	0.263	3.898	0.146	3.088	0.086	3.773	0.019	3.048	0.019
235	4554	112381	125658.22	−543514.5	A0pSi	p	0.009	6.337	0.023	6.224	0.023	6.090	0.016	5.951	0.054	6.038	0.020	6.052	0.015	6.011	0.037
236	4589	113697	130442.47	+511209.9	A3III	m	0.887	7.855	0.024	7.718	0.024	7.722	0.017	7.651	0.023	7.681	0.019	7.673	0.017	7.571	0.107
237	4605	114365	131058.43	−523400.8	A0pSi	p	0.000	6.196	0.023	6.275	0.028	6.244	0.020	6.207	0.050	6.224	0.021	6.314	0.015	6.227	0.043
238	4634	115331	131713.92	−435846.1	A3V?m	m	0.632	5.537	0.027	5.489	0.052	5.431	0.019	5.402	0.064	5.254	0.028	5.487	0.014	5.454	0.030
239	4649	115708	131837.25	+262156.9	A3pSrEu	p	0.791	7.230	0.017	7.185	0.030	7.147	0.017	7.138	0.033	7.147	0.021	7.164	0.016	7.190	0.090
240	4657	116114	132146.31	−184431.6	F0VpSrCrEu	p	0.053	6.478	0.018	6.416	0.034	6.348	0.023	6.295	0.049	6.313	0.022	6.365	0.015	6.303	0.046
241	4662	116303	132203.92	+435412.2	A8IIIm	m	0.420	5.763	0.035	5.664	0.026	5.617	0.017	5.614	0.058	5.449	0.027	5.651	0.015	5.585	0.030
242	4674	116657	132356.29	+545518.4	A6IVm	m	0.149	7.330		6.841		2.821	0.342	2.751	0.022	1.701	0.243	1.689	0.007	1.954	0.012
243	4666	116458	132550.30	−703738.1	B9IIIpEuCr	p	0.304	5.664	0.023	5.697	0.023	5.675	0.023	5.637	0.059	5.617	0.028	5.785	0.015	5.708	0.035
244	4713	118022	133407.93	+033932.3	A0VpSrCr	p	0.288	5.184	0.277	4.980	0.268	4.879	0.019	4.879	0.070	4.617	0.038	4.966	0.014	4.888	0.026
245	4715	118054	133440.45	−131251.6	A1VSrEuCr	p	0.115	5.890	0.032	5.913	0.028	5.875	0.020	5.882	0.051	5.785	0.025	5.949	0.015	5.913	0.039
246	4760	119213	134021.38	+571227.4	A2IVpSrCr	p	0.316	6.151	0.023	6.210	0.026	6.197	0.026	6.176	0.049	6.195	0.020	6.247	0.016	6.086	0.038
247	4767	119419	134416.00	−510044.8	A0pSiCr	p	0.000	6.613	0.027	6.698	0.048	6.706	0.026	6.713	0.039	6.754	0.020	6.828	0.017	6.924	0.075
248	4791	120198	134635.66	+542557.6	A0VpSrCrEu	p	0.000	5.706	0.035	5.776	0.016	5.757	0.016	5.775	0.056	5.697	0.027	5.850	0.016	5.813	0.034
249	4802	120709	135149.60	−325938.7	B5IVp	p	0.115	4.129	0.829	4.946	0.017	4.971	0.027	4.606	0.085	4.272	0.045	4.334	0.014	3.754	0.021
250	4857	122532	140327.47	−412524.0	A0pSi	p	0.118	6.261	0.027	6.364	0.037	6.328	0.016	6.349	0.042	6.377	0.020	6.445	0.016	6.235	0.040
251	4906	124224	141215.80	+022434.0	A0IVpSi	p	0.000	5.254	0.020	5.293	0.037	5.284	0.024	5.300	0.062	5.145	0.025	5.405	0.015	5.366	0.031
252	4931	125273	141644.79	+531548.8	A6	m	0.545	7.285	0.017	7.196	0.024	7.188	0.026	7.173	0.030	7.205	0.020	7.221	0.015	7.289	0.078
253	4930	125248	141838.26	−184257.5	A2VspSrCrEu	p	0.025	5.835	0.017	5.873	0.035	5.836	0.017	5.856	0.055	5.790	0.026	5.940	0.014	5.623	0.030
254	4936	125337	141906.59	−132215.9	A3Vm	m	0.338	4.394	0.225	4.282	0.211	4.241	0.016	4.230	0.093	3.698	0.062	4.264	0.016	4.137	0.023
255	4948	125823	142302.24	−393042.5	B5IIIp	p	0.000	5.172	0.314	4.985	0.028	4.922	0.024	5.021	0.075	4.735	0.038	5.098	0.015	5.042	0.027
256	4944	125630	142332.08	−663842.1	A2pSrSi	p	0.369	6.688	0.020	6.730	0.037	6.730	0.024	6.677	0.034	6.713	0.021	6.721	0.015	6.403	0.045
257	4965	126515	142555.88	+005933.8	A2VpSrSiCr	p	0.056	7.099	0.017	7.151	0.032	7.147	0.027	7.119	0.032	7.156	0.020	7.185	0.015	6.825	0.058
258	4967	126661	142627.36	+191336.8	A8IIIm	m	0.489	5.159	0.342	4.940	0.024	4.869	0.028	4.847	0.075	4.551	0.039	4.896	0.014	4.840	0.026
259	5048	129174	144043.73	+162505.2	B9IIIMnHgSi	HgMn	0.193	4.353		4.195		5.051	0.017	5.243	0.157	4.944	0.090	5.343	0.023	5.302	0.055
260	5035	128898	144230.40	−645830.5	A9VpSrCrEu	p	0.255	2.543	0.284	2.470	0.195	2.424	0.216	2.846	0.187	1.559	0.028	2.630	0.012	2.569	0.021
261	5088	130559	144919.05	−140856.5	A0III:spSrCr	p	0.000	5.177	0.017	5.153	0.027	5.105	0.017	5.102	0.068	4.875	0.033	5.190	0.014	5.149	0.028
262	5101	131120	145251.07	−374811.4	B7IIIp	p	0.000	5.382	0.034	5.434	0.037	5.422	0.016	5.445	0.064	5.308	0.028	5.560	0.014	5.591	0.035
263	5156	133029	150038.72	+471638.8	A0IIIpSiCrSr	p	0.056	6.492	0.035	6.585	0.046	6.570	0.017	6.568	0.040	6.640	0.019	6.693	0.015	6.700	0.048
264	5173	133652	150633.20	−305506.5	A0pSi	p	0.000	6.034	0.024	6.065	0.030	6.051	0.023	6.087	0.055	6.050	0.023	6.183	0.015	6.094	0.052
265	5171	133518	150655.97	−520147.2	B3IIIp	p	0.341	6.605	0.029	6.665	0.037	6.653	0.017	6.664	0.034	6.720	0.020	6.773	0.015	6.683	0.057
266	5184	133880	150812.12	−403502.1	B8IVpSi	p	0.065	5.913	0.026	5.934	0.028	5.934	0.023	5.922	0.049	5.938	0.023	6.072	0.015	5.947	0.051
267	5197	134305	150844.86	+122920.0	A7pSrEuCr	p	0.329	6.809	0.018	6.793	0.024	6.750	0.017	6.735	0.040	6.740	0.019	6.778	0.014	6.757	0.056
268	5180	133792	150925.52	−633834.5	A0pSrCr	p	0.344	6.022	0.018	6.072	0.039	6.001	0.020	5.954	0.043	5.939	0.024	6.056	0.015	6.086	0.050
269	5209	134793	151134.37	+083101.4	A4pSrCrEu	p	0.198	7.368	0.017	7.349	0.041	7.313	0.023	7.310	0.029	7.354	0.020	7.384	0.016	7.327	0.078
270	5208	134759	151213.29	−194730.2	B9IVpSi	p	0.065	4.820	0.175	4.790	0.075	4.702	0.023	4.688	0.076	4.317	0.042	4.811	0.014	4.707	0.028
271	5226	135297	151421.01	+002210.5	A0IVSrCrEu	p	0.344	7.860	0.018	7.956	0.048	7.934	0.030	7.896	0.024	7.931	0.021	7.964	0.019	7.827	0.129
272	5244	135730	151809.42	−410340.2	A3V?m	m	0.489	6.018	0.018	6.017	0.048	5.936	0.017	5.962	0.052	5.885	0.024	6.001	0.015	5.910	0.039
273	5264	136347	152130.09	−381307.3	A0IVpSi	p	0.087	6.597	0.017	6.619	0.043	6.611	0.027	6.218	0.044	6.423	0.021	6.504	0.016	6.471	0.058
274	5281	136933	152445.01	−394237.0	A0pSi	p	0.000	5.505	0.024	5.473	0.046	5.494	0.020	5.419	0.061	5.336	0.030	5.590	0.015	5.568	0.039
275	5318	137909	152749.72	+290620.3	A8IIIpSrCrEu	p	0.388	3.598	0.301	3.552	0.209	3.456	0.298	3.441	0.117	2.575	0.030	3.264	0.011	3.282	0.018
276	5335	138213	152844.39	+471205.5	A2IVm	m	0.304	5.862	0.023	5.881	0.019	5.852	0.019	5.852	0.054	5.765	0.025	5.916	0.014	5.875	0.029
277	5322	137949	152934.74	−172627.4	F0VpEuCrSr	p	0.313	6.314	0.024	6.281	0.035	6.247	0.020	6.227	0.049	6.220	0.023	6.250	0.015	5.935	0.047
278	5306	137509	153127.12	−710343.7	A0SiCrFe	p	0.019	7.021	0.018	7.132	0.027	7.177	0.019	7.228	0.030	7.275	0.020	6.901	0.017	5.528	0.031
279	5341	138413	153236.70	−194013.7	A2IV	m	0.586	5.256	0.020	5.261	0.043	5.146	0.017	5.086	0.074	4.897	0.035	5.192	0.014	5.098	0.031
280	5389	140160	154147.42	+125051.1	A2VpSrEu	p	0.146	5.183	0.019	5.234	0.020	5.201	0.019	5.232	0.068	4.970	0.033	5.258	0.016	5.221	0.033
281	5391	140232	154154.71	+182750.5	A8Vam	m	0.087	5.370	0.023	5.327	0.019	5.296	0.016	5.259	0.069	5.067	0.034	5.327	0.015	5.288	0.030
282	5407	140728	154250.76	+522139.3	A0VpSiCr	p	0.000	5.469	0.020	5.576	0.026	5.559	0.017	5.583	0.064	5.435	0.030	5.651	0.015	5.625	0.027
283	5435	141675	154737.93	+552235.9	A8IVam	m	0.195	5.406	0.018	5.380	0.014	5.360	0.017	5.265	0.073	5.096	0.032	5.345	0.014	5.331	0.026
284	5436	141795	155048.96	+042839.9	A2Vm	m	0.474	3.563	0.257	3.440	0.233	3.424	0.266	3.453	0.129	2.867	0.069	3.488	0.008	3.438	0.016
285	5429	141556	155057.54	−333737.8	B9IVp	p	0.214	4.053	0.266	4.004	0.219	3.990	0.035	4.009	0.085	3.630	0.049	4.098	0.014	4.059	0.022
286	5450	142301	155439.53	−251437.5	B8IIIpSi	p	0.257	5.925	0.020	6.000	0.034	5.987	0.017	5.966	0.052	6.001	0.023	6.137	0.015	6.024	0.056
287	5465	142990	155834.87	−244953.4	B5IVp	p	0.226	5.585	0.017	5.671	0.035	5.649	0.026	5.660	0.053	5.661	0.027	5.811	0.016	5.753	0.041
288	5492	143807	160126.56	+295103.8	A0VHgMn	HgMn	0.000	5.013	0.037	5.105	0.017	5.071	0.019	5.092	0.070	4.859	0.036	5.178	0.014	5.141	0.024
289	5506	144206	160247.90	+460212.1	B9IIIHgMn	HgMn	0.084	4.775	0.037	4.922	0.034	4.880	0.017	4.921	0.074	4.633	0.026	5.009	0.014	4.964	0.025
290	5489	143699	160324.19	−383609.1	B6IVp	p	0.084	5.217	0.037	5.287	0.024	5.270	0.020	5.255	0.067	5.151	0.032	5.440	0.015	5.324	0.030
291	5498	143939	160444.49	−392604.8	B9IIIpSiCrEu	p	0.105	7.052	0.018	7.129	0.028	7.147	0.017	6.770	0.030	7.019	0.019	7.046	0.015	6.478	0.056
292	5514	144334	160606.38	−233622.7	B8Vp	p	0.164	6.026	0.063	5.967	0.046	5.920	0.023	5.810	0.056	5.849	0.024	5.958	0.015	5.590	0.043
293	5505	144197	160629.44	−451023.5	F0IIIm	m	0.264	4.519	0.300	4.284	0.268	4.267	0.316	4.287	0.077	3.752	0.048	4.315	0.015	4.296	0.022
294	5525	144661	160751.89	−242744.5	B7IVHgMn	HgMn	0.338	6.379	0.017	6.436	0.028	6.433	0.017	6.443	0.046	6.442	0.022	6.562	0.017	6.589	0.077
295	5531	144897	160951.18	−410927.8	B8pEuCr	p	1.122	7.995	0.023	8.003	0.037	7.915	0.023	7.927	0.022	7.976	0.020	8.005	0.021	8.147	0.233
296	5541	145389	160846.18	+445605.7	B9IIIHgMn	HgMn	0.223	4.244	0.247	4.298	0.206	4.320	0.014	4.352	0.092	3.923	0.054	4.417	0.015	4.377	0.023
297	5537	145102	161015.92	−265432.9	B9VpSi	p	0.493	6.284	0.017	6.214	0.028	6.239	0.027	6.207	0.047	6.172	0.021	6.264	0.016	6.139	0.052
298	5585	147010	162005.49	−200323.0	B9III/IVpSiFe	p	0.871	6.754	0.020	6.750	0.035	6.677	0.017	6.686	0.040	6.698	0.021	6.688	0.031	5.178	0.034
299	5601	147550	162238.91	−020447.5	B9VpSi	p	0.477	6.000	0.017	5.975	0.028	5.956	0.017	6.064	0.050	5.886	0.026	6.017	0.016	5.946	0.041
300	5627	148330	162425.34	+551218.3	A2IIIpSiSr	p	0.000	5.699	0.032	5.697	0.017	5.718	0.024	5.698	0.058	5.591	0.028	5.773	0.014	5.767	0.029
301	5621	148112	162524.95	+140159.8	A0IVpCrEu	p	0.198							4.479	0.084	4.068	0.046	4.578	0.014	4.540	0.026
302	5608	147890	162539.14	−292401.6	A0III/IVpSi	p	0.889	7.044	0.020	7.015	0.046	6.928	0.019	6.825	0.034	6.859	0.020	6.906	0.017	6.809	0.082
303	5623	148199	162729.68	−291717.8	B8VpSiSr	p	0.657	6.711	0.024	6.754	0.048	6.719	0.026	6.694	0.036	6.726	0.020	6.797	0.017	6.849	0.097
304	5630	148367	162748.19	−082218.2	A5IVm	m	0.429	4.270	0.244	4.155	0.200	4.164	0.035	4.226	0.086	3.586	0.060	4.156	0.014	4.147	0.024
305	5626	148321	162815.09	−252714.4	A2IIIm	m	0.657	6.671	0.024	6.669	0.063	6.624	0.026	6.590	0.038	6.606	0.020	6.687	0.018	6.816	0.097
306	5644	148898	163208.20	−212759.0	A7VSrCrEu	p	0.078	3.921	0.187	3.848	0.175	4.137	0.014	4.121	0.108	3.661	0.057	4.193	0.014	4.168	0.027
307	5653	149121	163235.69	+053116.4	B9.5IIIHgMn	HgMn	0.186	5.679	0.020	5.685	0.050	5.676	0.019	5.704	0.054	5.601	0.024	5.757	0.015	5.555	0.037
308	5678	149822	163642.94	+152950.8	A2VpSiSrCr	p	0.000	6.372	0.020	6.477	0.030	6.453	0.017	6.440	0.044	6.482	0.022	6.567	0.015	6.648	0.060
309	5681	149911	163801.55	−063216.9	A2VpSrCr	p	0.487	5.659	0.028	5.617	0.046	5.519	0.027	5.500	0.058	5.331	0.028	5.582	0.015	5.568	0.042
310	5686	150035	163931.56	−271708.2	A5pSrCr	p	0.578	7.914	0.026	7.862	0.071	7.763	0.030	7.708	0.025	7.730	0.020	7.718	0.021	7.124	0.102
311	5724	151199	164258.46	+554124.4	A3VpSr	p	0.276	5.978	0.017	6.014	0.017	6.000	0.019	5.985	0.053	5.928	0.026	6.030	0.015	5.988	0.029
312	5705	150549	164639.99	−670634.9	A0Vp	p	0.000	5.212	0.024	5.285	0.020	5.289	0.017	5.248	0.063	5.115	0.030	5.361	0.015	5.251	0.025
313	5735	151525	164746.42	+051448.3	B9.5VpCrEu	p	0.195	5.085	0.037	5.081	0.037	5.098	0.019	5.025	0.069	4.779	0.034	5.142	0.015	5.072	0.027
314	5759	152107	164914.22	+455900.0	A3VpSrCrEu	p	0.295	4.775	0.256	4.580	0.035	4.572	0.017	4.563	0.085	4.185	0.028	4.624	0.015	4.596	0.022
315	5777	152308	165204.85	+145827.2	A0:IVpCrEu	p	0.099	6.504	0.034	6.533	0.032	6.550	0.017	6.561	0.034	6.551	0.021	6.499	0.016	6.042	0.042
316	5812	153286	165604.57	+472214.8	A5m	m	0.691	6.432	0.020	6.352	0.017	6.326	0.017	6.267	0.046	6.286	0.019	6.335	0.015	6.303	0.045
317	5828	153882	170133.05	+145659.0	A0VpSiSrCrEu	p	0.251	6.136	0.035	6.162	0.020	6.157	0.019	6.101	0.043	6.109	0.022	6.226	0.015	6.150	0.048
318	5856	154708	171028.52	−580017.4	A2pCrSrEu	p	1.488	8.105	0.020	7.984	0.035	7.952	0.028	7.910	0.024	7.946	0.020	7.916	0.019	7.891	0.166
319	5963	158704	173144.37	−261611.0	B9II/IIIHgMn	HgMn	0.158	6.152	0.023	6.196	0.037	6.151	0.017	6.118	0.041	6.134	0.022	6.274	0.016	6.245	0.079
320	5992	159541	173210.56	+551103.4	A8Vm	m	0.526	4.831	0.247	4.578	0.202	4.243	0.019	4.411	0.081	3.719	0.052	4.267	0.015	4.189	0.025
321	5994	159560	173216.03	+551022.4	A4IVm	m	0.393	4.760	0.236	4.500	0.244	4.158	0.014	4.112	0.096	3.757	0.036	4.195	0.014	4.159	0.022
322	5987	159376	173518.50	−220237.8	B9V:pSi	p	0.322	6.282	0.020	6.291	0.057	6.248	0.024	6.226	0.035	6.208	0.019	6.354	0.014	6.302	0.058
323	6056	161321	174417.25	+142436.2	A5m	m	0.322	5.739	0.018	5.705	0.017	5.650		5.681	0.057	5.559	0.029	5.748	0.014	5.733	0.035
324	6122	162725	175358.14	−344951.8	B9.5III:SiSr	p	0.319	6.230	0.020	6.235	0.035	6.262	0.019	6.279	0.038	6.223	0.019	6.324	0.016	6.042	0.046
325	6189	164429	175852.31	+452834.4	B9VpSiSrCr	p	0.071	6.527	0.020	6.605	0.017	6.605	0.017	6.569	0.039	6.623	0.019	6.691	0.015	6.699	0.051
326	6186	164258	180015.67	+003746.1	A6VpSrCr	p	0.093	5.931	0.026	5.894	0.026	5.894	0.020	5.923	0.055	5.820	0.025	5.962	0.015	5.894	0.042
327	6215	165474	180543.30	+120013.9	A6VpSrCrEuSi	p	0.477	6.323	0.020	6.171	0.046	6.165	0.024	6.131	0.079	6.121	0.028	6.193	0.014	6.192	0.064
328	6239	166469	181158.16	−285405.5	A0IIIpSrCr	p	0.189	6.409	0.020	6.446	0.030	6.427	0.019	6.389	0.034	6.406	0.021	6.498	0.017	6.563	0.079
329	6240	166473	181225.83	−374509.2	A5pCrSrEu	p	0.949	7.473	0.023	7.492	0.050	7.447	0.027	7.404	0.027	7.433	0.019	7.428	0.019	7.161	0.094
330	6255	166960	181310.00	−040041.8	A6m	m	0.524	6.087	0.019	5.973	0.026	5.953	0.020	5.909	0.056	5.872	0.025	5.977	0.015	5.903	0.046
331	6309	169027	181658.74	+684429.2	A0VpHgMnZr	HgMn	0.000	6.862	0.017	6.954	0.026	6.947	0.017	6.900	0.037	6.965	0.020	7.027	0.015	7.006	0.038
332	6333	170000	182045.43	+712016.1	A0VpSi	p	0.155	4.182	0.217	4.453	0.035	4.392	0.027	4.421	0.095	3.992	0.052	4.500	0.014	4.478	0.022
333	6294	168733	182253.08	−364010.4	B8.5IIpSrTi	p	0.081	5.527	0.024	5.564	0.026	5.584	0.019	5.534	0.063	5.495	0.027	5.642	0.016	5.282	0.033
334	6348	170397	182946.76	−143455.2	A2IIIpSrSi	p	0.000	5.936	0.017	5.959	0.032	5.934	0.016	6.010	0.041	5.883	0.023	6.073	0.019	5.706	0.066
335	6364	170973	183206.89	+033934.6	A0VpSiSrEu	p	0.028	6.362	0.019	6.473	0.046	6.459	0.027	6.476	0.040	6.481	0.021	6.552	0.015	6.325	0.049
336	6374	171279	183412.41	−074244.4	A0V SrCrEu	p	0.431	7.054	0.026	7.052	0.034	7.019	0.030	6.975	0.030	6.993	0.020	7.412	0.128	6.501
337	6388	171586	183536.49	+045609.6	A1VpSrCrSi	p	0.350	6.230	0.043	6.309	0.030	6.295	0.017	6.021	0.045	6.249	0.022	6.301	0.015	6.364	0.057
338	6406	172044	183637.34	+332808.5	B8II/IIIHgMn	HgMn	0.139	5.515	0.017	5.630	0.024	5.651	0.016	5.700	0.063	5.652	0.029	5.774	0.013	5.580	0.042
339	6430	172728	183733.50	+623135.7	A0VZrY	p	0.000	5.724	0.019	5.772	0.043	5.752	0.017	5.752	0.054	5.718	0.027	5.855	0.015	5.815	0.033
340	6431	172741	184012.20	+382201.9	A6Vm	m	0.316	6.040	0.019	5.994	0.017	5.960	0.016	5.930	0.051	5.862	0.024	5.978	0.014	5.920	0.034
341	6449	173524	184237.95	+553222.0	A0IIIHgMn	HgMn	0.006	5.144	0.037	5.181	0.030	5.173	0.017	5.197	0.072	4.979	0.035	5.298	0.014	5.275	0.025
342	6458	173648	184446.36	+373618.4	A7IVm	m	0.295	4.060	0.284	4.013	0.219	3.967	0.230	3.891	0.094	3.267	0.065	3.916	0.015	3.902	0.022
343	6459	173650	184535.62	+215904.9	A1VpSiSrCr	p	0.096	6.381	0.017	6.434	0.048	6.395	0.023	6.326	0.045	6.379	0.021	6.430	0.015	6.334	0.045
344	6460	173654	184628.59	−005742.1	A6Vm	m	0.074	5.650	0.023	5.627	0.030	5.604	0.016	5.340	0.092	5.376	0.029	5.549	0.017	5.099	0.038
345	6493	174704	185206.60	−090457.6	F1VpSrEuCr	p	0.629	6.847	0.018	6.741	0.032	6.682	0.027	6.545	0.044	6.613	0.021	6.627	0.017	6.433	0.054
346	6498	174933	185216.43	+212530.5	B9II-IIIHgMn	HgMn	0.084	5.511	0.020	5.570	0.027	5.589	0.017	5.597	0.061	5.487	0.027	5.711	0.014	5.692	0.033
347	6518	175744	185603.80	+175943.2	B9pSi	p	0.089	6.675	0.018	6.728	0.019	6.778	0.016	6.729	0.038	6.773	0.019	6.818	0.016	6.629	0.075
348	6515	175640	185622.66	−014759.5	B9IIIHgMnY	HgMn	0.211	6.245	0.020	6.300	0.024	6.251	0.030	6.275	0.040	6.319	0.020	6.368	0.018	6.141	0.076
349	6510	175362	185640.50	−372035.7	B8IVpSi	p	0.000	5.623	0.019	5.659	0.027	5.684	0.020	5.747	0.053	5.718	0.025	5.844	0.015	5.337	0.031
350	6529	176232	185846.92	+135423.9	A6IIIpSr	p	0.431	5.421	0.037	5.323	0.037	5.301	0.020	5.291	0.056	5.084	0.029	5.366	0.016	5.298	0.031
351	6582	178065	190709.03	+003827.5	B9IIIHgMn	HgMn	0.499	6.347	0.020	6.380	0.028	6.348	0.020	6.358	0.031	6.328	0.018	6.416	0.012	6.285	0.059
352	6615	179527	191146.01	+311700.4	B8IIIpSiSr	p	0.260	5.900	0.019	5.999	0.017	6.005	0.028	5.999	0.046	5.954	0.024	6.088	0.014	6.087	0.047
353	6697	182308	191946.14	+642326.9	B9IVHgMn	HgMn	0.028	6.646	0.020	6.738	0.030	6.750	0.017	6.728	0.033	6.782	0.021	6.776	0.015	6.165	0.035
354	6726	183056	192609.13	+361904.4	B9.5IIpSi	p	0.000	5.304	0.018	5.428	0.020	5.440	0.017	5.433	0.062	5.281	0.031	5.531	0.015	5.301	0.031
355	6748	183806	193321.62	−451618.3	A0VpSrCr	p	0.049	5.558	0.029	5.612	0.043	5.525	0.027	5.504	0.061	5.332	0.032	5.585	0.015	5.527	0.036
356	6789	184927	193532.01	+311635.9	B2Vp	p	0.288	7.782	0.017	7.940	0.017	7.973	0.017	8.012	0.023	8.068	0.020	8.046	0.018	7.126	0.071
357	6786	184905	193443.93	+435645.1	A0SiCr	p	0.211	6.714	0.039	6.735	0.019	6.794	0.016	6.688	0.047	6.628	0.020	6.704	0.018	6.719	0.026
358	6775	184552	193601.65	−244308.7	A7Vm	m	0.167	5.380	0.017	5.342	0.019	5.278	0.024	5.168	0.068	5.052	0.032	5.320	0.014	5.282	0.032
359	6790	184961	193608.35	+223508.7	B9IVpCrSiEu	p	0.167	6.331	0.018	6.434	0.017	6.448	0.020	6.476	0.036	6.467	0.020	6.515	0.016	6.322	0.069
360	6809	185330	193656.65	+382301.8	B5II-IIIp	p	0.118	6.708	0.018	6.818	0.019	6.848	0.017	6.843	0.034	6.884	0.021	6.938	0.015	6.689	0.050
361	6832	186122	194212.81	+121135.7	B9IIIHgMn	HgMn	0.121	6.379	0.017	6.454	0.016	6.471	0.017	6.470	0.036	6.519	0.021	6.603	0.016	6.549	0.054
362	6833	186205	194237.85	+091339.0	B3Vp	p	0.856	8.404	0.026	8.475	0.046	8.475	0.023	8.421	0.022	8.481	0.019	8.506	0.023	7.627	0.135
363	6884	187566	194959.92	+175726.0	B7VpSi	p	0.214	8.116	0.023	8.206	0.028	8.204	0.017	8.173	0.024	8.234	0.021	8.257	0.021	8.157	0.186
364	6882	187474	195150.60	−395227.7	A0IV:EuSrSi	p	0.000	5.368	0.023	5.440	0.026	5.431	0.020	5.434	0.064	5.295	0.031	5.555	0.016	5.499	0.033
365	6881	187473	195110.24	−272819.1	B9pSrCrSi	p	0.236	7.375	0.023	7.422	0.028	7.435	0.028	7.452	0.025	7.489	0.020	7.527	0.018	7.107	0.117
366	6907	188041	195318.74	−030652.1	A5IIIpSrCrEu	p	0.313	5.527	0.020	5.548	0.028	5.487	0.020	5.574	0.062	5.319	0.028	5.576	0.014	5.485	0.037
367	6990	189574	195912.70	+385249.5	A2/3m	m	0.889	7.244	0.024	7.186	0.020	7.175	0.017	7.138	0.031	7.147	0.019	7.207	0.018	7.603	0.121
368	7003	189849	200106.05	+274512.9	A5III	m	0.198	4.554	0.225	4.436	0.197	4.178	0.020	4.174	0.095	3.612	0.064	4.182	0.014	4.189	0.022
369	7012	190068	200238.73	+152138.3	A0IIIpSiCr	p	0.419	8.223	0.028	8.321	0.041	8.293	0.026	8.290	0.024	8.341	0.020	8.364	0.023	8.894	0.476
370	7023	190229	200330.02	+160152.5	B8III:HgMn	HgMn	0.118	5.754	0.018	5.913	0.035	5.909	0.016	5.880	0.051	5.889	0.023	5.974	0.014	5.388	0.034
371	7001	189832	200335.22	−385109.1	A6pCrSrEu	p	0.440	6.512	0.028	6.407	0.034	6.375	0.019	6.440	0.044	6.368	0.020	6.429	0.015	6.263	0.045
372	7061	191110	200831.27	−100345.3	A0IIIp	p	0.434	5.989	0.019	6.039	0.027	5.989	0.032	5.981	0.051	5.959	0.024	6.102	0.017	6.018	0.044
373	7091	191742	200947.04	+423228.8	A5pSrCr	p	0.301	7.765	0.024	7.750		7.730	0.023	7.716	0.023	7.749	0.020	7.686	0.019	7.130	0.082
374	7101	191980	201203.85	+152128.1	B5/6IIIp	p	0.074	8.133	0.023	8.255	0.023	8.317	0.016	8.302	0.024	8.374	0.020	8.386	0.020	8.608	0.296
375	7130	192678	201336.33	+533933.6	A0VpCr	p	0.152	7.236	0.023	7.322	0.048	7.335	0.016	7.318	0.029	7.376	0.020	7.404	0.016	7.219	0.060
376	7142	192913	201627.20	+274633.9	A0IIpSiCr	p	0.081	6.664	0.018	6.758	0.017	6.756	0.017	6.755	0.038	6.814	0.020	6.886	0.016	6.920	0.080
377	7169	193722	201956.04	+465014.3	B8IIIpSi	p	0.192	6.495	0.018	6.581	0.017	6.611	0.019	6.635	0.039	6.644	0.020	6.726	0.018	6.595	0.050
378	7162	193452	202046.55	−144705.6	B9.5VpSrPt	p	0.000	6.019	0.020	6.052	0.035	6.004	0.024	5.983	0.053	5.946	0.025	6.086	0.017	5.944	0.042
379	7209	195217	202921.14	+200515.7	A4m	m	0.409	6.120	0.017	6.100	0.032	6.043	0.017	6.054	0.052	5.986	0.023	6.048	0.015	5.693	0.042
380	7257	196502	203130.41	+745716.6	A2IVpSrCrEu	p	0.307	5.201	0.300	5.056	0.072	5.032	0.023	5.040	0.071	4.785	0.031	5.096	0.015	5.062	0.025
381	7247	196178	203354.84	+464137.9	B8pSi	p	0.000							6.079	0.050	6.029	0.024	6.123	0.019	5.903	0.083
382	7286	197461	204327.53	+150428.5	A7IIIp	p	0.422	3.898	0.259	3.744	0.244	3.831	0.275	3.610	0.117	2.977	0.075	3.630	0.014	3.560	0.020
383	7313	198513	204842.74	+515437.2	B8VpSi	p	0.078	6.427	0.023	6.521	0.016	6.550	0.020	6.350	0.045	6.480	0.020	6.550	0.016	6.591	0.061
384	7316	335238	205043.67	+294812.0	A1pCrEu	p	0.276	9.125	0.034	9.194	0.063	9.185	0.021	9.143	0.024	9.204	0.021	9.320	0.032	8.934
385	7321	198743	205239.23	−085859.9	A8Vm	m	0.606	4.287	0.238	4.077	0.217	3.961	0.035	3.980	0.086	3.387	0.067	4.015	0.014	3.963	0.022
386	7361	199728	205936.14	−190207.0	A0IIIpSi	p	0.000	6.401	0.020	6.445	0.043	6.472	0.026	6.490	0.041	6.539	0.019	6.607	0.015	6.503	0.064
387	7385	200311	210114.32	+434318.4	B9pSiCr	p	0.009	7.796	0.020	7.876	0.028	7.887	0.026	7.927	0.021	8.005	0.017	8.198	0.057	7.480	0.167
388	7429	201174	210622.60	+451613.9	A0VapSrEuCr	p	0.332	8.699	0.023	8.795	0.016	8.725	0.016	8.726	0.022	8.777	0.021	8.866	0.032	8.631
389	7441	201601	211020.49	+100753.7	A9VpSrCrEu	p	0.228	4.276	0.254	4.105	0.186	4.008	0.259	4.112	0.095	3.539	0.065	4.137	0.014	4.041	0.022
390	7475	202671	211757.29	−175906.5	B7IIIp	p	0.102	5.593	0.017	5.651	0.034	5.672	0.027	5.742	0.054	5.646	0.029	5.779	0.014	5.686	0.035
391	7483	203006	212045.64	−404834.1	A7VpSrCrEu	p	0.110	4.815	0.233	4.738	0.034	4.659	0.023	4.616	0.079	4.308	0.045	4.713	0.015	4.692	0.024
392	7524	204188	212626.66	+192232.3	A8m	m	0.146	5.677	0.067	5.487	0.027	5.506	0.026	5.516	0.054	5.353	0.029	5.562	0.014	5.528	0.032
393	7531	204411	212651.62	+485006.6	A5IIIpCrSrEu	p	0.000	5.051	0.017	5.085	0.023	5.059	0.016	5.019	0.070	4.767	0.038	5.059	0.014	4.997	0.025
394	7555	205087	213227.01	+232340.5	A0VpSiSr	p	0.025	6.723	0.023	6.816	0.043	6.829	0.024	6.822	0.037	6.863	0.021	6.935	0.016	6.874	0.085
395	7589	206088	214005.45	−163944.3	F0IIIpSr	p	0.264	3.289	0.222	3.065	0.209	3.065	0.259	2.957	0.178	2.275	0.004	3.020	0.013	3.042	0.018
396	7600	206546	214313.53	−193715.5	A6IVm	m	0.489	5.802	0.018	5.710	0.026	5.723	0.026	5.681	0.059	5.576	0.026	5.746	0.015	5.654	0.040
397	7602	206653	214637.91	−673546.8	B9pSi	p	0.127	7.293	0.027	7.387	0.037	7.350	0.026	7.338	0.027	7.398	0.019	7.450	0.016	7.508	0.149
398	7616	207098	214702.44	−160738.2	A5IIIm	m	0.149	2.253	0.263	2.062	0.194	2.013	0.222	2.290	0.419	1.596	0.205	2.132	0.015	2.108	0.021
399	7636	207857	215104.98	+393212.0	B8IIIHgMn	HgMn	0.242	6.243	0.020	6.330	0.017	6.368	0.017	6.341	0.046	6.392	0.021	6.486	0.015	6.443	0.049
400	7650	208217	215656.69	−615046.3	A0SrEuCr	p	0.877	6.934	0.029	6.940	0.035	6.842	0.017	6.860	0.035	6.889	0.019	6.920	0.017	6.909	0.071
401	7699	209515	220256.66	+443859.5	A0IVCrSi	p	0.009	5.521	0.017	5.565	0.052	5.545	0.024	5.553	0.056	5.411	0.028	5.596	0.014	5.544	0.035
402	7712	209790	220347.45	+643740.7	A6Vm	m	0.763	3.476	0.666	3.368	0.832	3.562	0.663	3.250	0.143	2.525	0.072	3.391	0.016	3.403	0.022
403	7702	209625	220447.42	−005422.8	A8IVm	m	0.220	4.948	0.037	4.958	0.075	4.782	0.019	4.758	0.075	4.542	0.041	4.822	0.014	4.742	0.029
404	7722	210071	220613.57	+562036.2	A0IIISiCr	p	0.037	6.487	0.017	6.565	0.020	6.578	0.024	6.513	0.035	6.601	0.021	6.630	0.015	6.447	0.048
405	7741	210873	221015.30	+720640.6	A0VpHgMnSr	HgMn	0.000	6.394	0.023	6.467	0.030	6.471	0.017	6.462	0.046	6.492	0.020	6.545	0.015	6.354	0.040
406	7811	212385	222437.60	−390737.4	A3pCrSrEu	p	0.431	6.666	0.019	6.686	0.027	6.633	0.017	6.595	0.040	6.635	0.020	6.679	0.017	6.730	0.065
407	7880	213637	223312.33	−200221.8	F1pEuSr	p	0.595	8.760	0.026	8.562	0.035	8.543	0.023	8.477	0.024	8.512	0.020	8.497	0.024	8.555	0.324
408	7893	213918	223407.28	+392007.9	B6IVpSiSrFe	p	0.335	8.649	0.024	8.696	0.026	8.708	0.017	8.723	0.024	8.773	0.020	8.894	0.034	8.800
409	7917	215038	223922.90	+753927.5	A0pSi	p	0.254	8.135	0.019	8.163	0.019	8.199	0.026	8.188	0.024	8.256	0.021	8.209	0.019	7.909	0.131
410	7925	215441	224407.51	+553521.2	A0III:pSi	p	0.691	8.598	0.023	8.649	0.028	8.670	0.024	8.676	0.023	8.726	0.020	8.729	0.022	8.634	0.255
411	7942	216018	224926.51	−112057.2	A9VpSrCrEu	p	0.202	7.343	0.018	7.373	0.039	7.311	0.026	7.296	0.030	7.312	0.022	7.343	0.017	6.817	0.082
412	7957	216533	225241.92	+584823.3	A1VpSrCrSi	p	0.399	7.656	0.020	7.705	0.043	7.668	0.024	7.620	0.023	7.654	0.020	7.671	0.022	7.781	0.143
413	7955	216494	225328.70	−113659.5	B9IIIHgMn	HgMn	0.136	5.899	0.017	5.962	0.020	5.925	0.019	6.019	0.051	5.951	0.023	6.087	0.016	5.995	0.047
414	7958	216608	225340.16	+444457.0	A3Vm	m	0.893	5.169	0.017	5.051	0.019	5.043		4.990	0.073	4.775	0.038	5.063	0.014	5.021	0.025
415	8020	219749	231756.01	+452920.1	B9VpSiSr	p	0.155	6.433	0.019	6.510	0.020	6.487	0.017	6.462	0.041	6.514	0.020	6.549	0.015	6.398	0.045
416	8044	220825	232655.95	+011520.1	A1VpSrCrSi	p	0.223	5.316	0.270	4.984	0.016	4.901	0.017	4.949	0.079	4.670	0.038	4.951	0.015	4.524	0.022
417	8049	220933	232740.39	+251002.2	A0IIIHgMn	HgMn	0.000	6.026	0.026	6.110	0.017	6.089	0.026	6.197	0.045	6.106	0.021	6.132	0.015	5.785	0.036
418	8050	221006	232900.98	−630638.4	A0VpSi	p	0.000	5.922	0.019	6.028	0.046	6.000	0.030	6.137	0.047	6.053	0.024	6.141	0.015	6.074	0.042
419	8064	221394	233143.03	+282412.6	A0VpSrCrSi	p	0.220	6.262	0.020	6.317	0.026	6.309	0.017	6.370	0.046	6.317	0.020	6.393	0.015	6.440	0.054
420	8071	221568	233247.65	+575420.1	A0VpSrCrEu	p	0.679	7.429	0.019	7.475	0.017	7.479	0.024	7.453	0.025	7.491	0.020	7.585	0.020	8.198	0.245
421	8069	221507	233258.26	−374905.8	B9IVHgMn	HgMn	0.062	4.477	0.256	4.669	0.039	4.611	0.027	4.659	0.079	4.337	0.042	4.733	0.014	4.696	0.024
422	8075	221760	233504.56	−423654.3	A2VpSrCrEu	p	0.267	4.558	0.244	4.368	0.256	4.465	0.019	4.354	0.092	3.985	0.054	4.485	0.016	4.470	0.027
423	8105	222377	233955.04	+094038.3	A2IVm	m	0.701	5.563	0.024	5.487	0.046	5.471	0.017	5.429	0.057	5.345	0.030	5.531	0.014	5.464	0.034
424	8137	223461	234939.39	+285032.6	A5II-III	m	0.257	5.551	0.019	5.544	0.028	5.497	0.019	5.478	0.059	5.284	0.027	5.546	0.014	5.533	0.040
425	8144	223640	235121.34	−185433.0	A0VpSiSr	p	0.031	5.415	0.024	5.506	0.017	5.505	0.017	5.523	0.058	5.424	0.026	5.652	0.014	5.580	0.038
426	8158	224002	235418.96	+250800.3	A3m	m	0.908	7.374	0.026	7.302	0.059	7.236	0.024	7.233	0.028	7.264	0.020	7.288	0.016	7.330	0.096

Download table as: ASCIITypeset images: 1 2 3 4 5 6 7 8 9

The Galactic extinction corrections for 2MASS/WISE data should be made before discussions below. The Galactic extinction laws used are from Schlegel et al. (1998) for 2MASS data and from Yuan et al. (2013) for WISE data respectively. The Galactic extinction coefficient Av listed in Table 3 is obtainedusing Av = 3.1 E(B–V) and E(B–V) = (B–V)—(Bo–Vo), in which B–V is from Kharchenko & Roeser (2009),while Bo–Vo is from Cramer (1984) and/or Bessell (1990).

The cross-identifications of IRAS counterparts are made according to the positional error ellipse of the source, because it has a 95% confidence level (IRAS Explanatory Supplement 1988). Finally, 202 stars are found to have the IRAS counterparts from IRAS PSC/FSC, which is listed in Table 4. The contents in Table 4 are(1) the star number in this paper,(2) the IRAS PSC/FSC name,(3) and the fluxes in Jy for 12, 25, and 60 μm, and "q" shows the data quality, if q=1 means the upper limit value. From Table 4, it can be found that only six stars have good quality data in all 12, 25, and 60 μm, and 46 stars have good quality data in 12 and 25 μm.

Table 4.IRAS Observations of Ap, Am,and HgMn Stars in This Paper

No.	IRAS PSC/FSC	F12(Jy)	q	F25(Jy)	q	F60(Jy)	q
004	00057+2848	4.91e+00	3	9.89e-01	3	4.00e-01	1
012	F00389+2421	2.90e-01	3	1.56e-01	1	1.07e-01	1
017	00561−2937	4.84e-01	3	2.50e-01	1	4.00e-01	1
019	01001+4104	2.35e-01	3	2.85e-01	1	4.00e-01	1
023	01208+3727	3.87e-01	3	2.50e-01	1	4.00e-01	1
025	F01245+4050	2.13e-01	3	9.84e-02	1	2.29e-01	1
027	F01355+4508	1.06e-01	3	8.16e-02	1	1.40e-01	1
031	01507+1902	9.73e-01	3	3.93e-01	1	4.00e-01	1
033	01508+6325	1.21e+00	3	3.03e-01	3	4.83e-01	1
036	01594+0231	1.32e+00	3	3.28e-01	2	4.00e-01	1
037	01594+0231	1.32e+00	3	3.28e-01	2	4.00e-01	1
040	02037+2224	5.11e-01	3	2.62e-01	1	4.00e-01	1
041	F02176+4955	1.95e-01	3	9.31e-02	2	4.66e-01	1
042	F02236−1533	2.89e-01	3	1.40e-01	1	9.52e-02	1
043	02249+6710	1.04e+00	3	4.36e-01	2	4.00e-01	1
049	02542+3143	2.85e-01	3	2.94e-01	1	4.00e-01	1
050	F02589+2615	2.07e-01	3	1.17e-01	1	1.44e-01	1
051	03021−7205	2.19e-01	3	5.35e-01	1	4.00e-01	1
053	03134−0900	8.67e-01	3	2.38e-01	3	4.00e-01	1
054	F03129+3430	2.27e-01	3	7.87e-02	1	2.47e-01	1
057	F03298+0912	1.76e-01	3	1.60e-01	1	3.20e-01	1
058	F03340−1737	2.21e-01	3	8.03e-02	1	1.97e-01	1
061	F03381−0522	1.79e-01	3	1.00e-01	1	1.27e-01	1
062	03428+2412	2.51e+00	3	9.07e+00	3	3.23e+01	1
063	03440+7043	2.93e-01	3	2.50e-01	1	4.00e-01	1
064	F03469+2205	1.49e-01	3	1.69e-01	1	3.53e-01	2
066	03529−1214	3.61e-01	3	2.50e-01	1	4.00e-01	1
067	03578−2409	4.46e-01	3	2.50e-01	1	4.00e-01	1
069	F04035+2728	3.75e-01	3	3.03e-01	3	8.24e-01	2
071	F04098+2217	2.07e-01	3	1.54e-01	1	2.74e-01	1
072	04143+2027	6.80e-01	3	3.08e-01	1	4.00e-01	1
073	F04164+2101	2.26e-01	3	1.71e-01	2	2.16e-01	1
074	F04166+2139	1.98e-01	3	1.59e-01	1	1.82e-01	1
075	04160−3355	1.18e+00	3	2.59e-01	3	4.00e-01	1
076	04165−2305	2.36e-01	3	3.43e-01	1	4.00e-01	1
077	04192+1357	4.33e-01	3	2.74e-01	1	4.00e-01	1
078	F04205+1639	3.65e-01	3	1.52e-01	2	2.58e-01	1
079	04226+1748	9.36e-01	3	2.94e-01	1	4.00e-01	1
080	04250+2130	3.92e-01	3	3.72e-01	2	4.00e-01	1
081	F04260+1256	6.12e-01	3	1.68e-01	2	3.92e-01	1
082	04277+1534	4.71e-01	3	3.13e-01	1	4.00e-01	1
084	F04314−0650	1.91e-01	3	8.15e-02	1	1.29e-01	1
085	04329−5508	1.56e+00	3	3.72e-01	3	4.00e-01	1
086	04328+1003	1.22e+00	3	4.25e-01	1	4.00e-01	1
087	F04363+0746	4.53e-01	3	1.29e-01	2	2.14e-01	1
088	04362+1542	4.03e-01	3	3.14e-01	1	4.41e-01	1
089	04432+1136	4.59e-01	3	3.03e-01	1	4.00e-01	1
090	04438+5640	5.73e-01	3	2.50e-01	1	4.00e-01	1
094	05017+1520	5.98e-01	3	2.68e-01	1	4.00e-01	1
097	F05042−0443	3.24e-01	3	1.04e-01	1	1.33e-01	1
098	05065+0946	4.21e-01	3	4.24e-01	1	4.00e-01	1
099	05066+2758	3.22e-01	3	4.02e-01	1	4.00e-01	1
100	F05060+7353	2.33e-01	3	1.08e-01	1	1.73e-01	1
101	05106−1615	1.45e+00	3	3.72e-01	3	4.00e-01	1
102	05099+3825	7.71e-01	3	2.50e-01	1	4.00e-01	1
108	05231+2833	6.35e+00	3	1.35e+00	3	4.00e-01	1
111	F05254−4059	3.24e-01	3	6.76e-02	2	9.85e-02	1
115	05330−0556	1.37e+00	3	2.51e+00	1	6.99e+00	1
120	F05420+4948	2.65e-01	3	1.00e-01	1	1.49e-01	1
124	05566−0933	5.88e-01	3	2.50e-01	1	4.00e-01	1
125	05563+3712	3.16e+00	3	7.43e-01	3	4.00e-01	1
129	06031+3829	4.85e-01	3	2.99e-01	1	4.00e-01	1
130	06051−4217	2.09e-01	3	2.50e-01	1	7.18e-01	1
135	06222+5618	4.09e-01	3	3.81e-01	1	4.00e-01	1
136	F06291+3229	2.21e-01	3	1.70e-01	1	2.91e-01	1
146	07033−5640	3.35e-01	3	2.50e-01	1	4.00e-01	1
148	07105−4024	3.83e-01	3	2.50e-01	1	4.00e-01	1
149	F07133−4645	1.22e-01	3	4.78e-02	1	2.57e-01	1
153	F07321+0250	1.78e-01	3	8.95e-02	1	1.67e-01	1
155	F07477+3321	1.85e-01	3	1.29e-01	1	1.15e-01	1
156	F07516−4928	2.54e-01	3	7.72e-02	2	7.16e-01	1
160	F07575+6027	1.83e-01	3	8.70e-02	1	8.77e-02	1
163	08054−2409	7.20e+00	3	1.76e+00	3	3.97e-01	2
165	F08100+2948	1.99e-01	3	2.57e-01	1	8.48e-02	1
167	08235−1445	2.39e-01	3	2.50e-01	1	4.00e-01	1
169	F08301+6519	3.91e-01	3	1.34e-01	2	1.08e-01	1
172	F08310+7453	2.56e-01	3	8.19e-02	2	1.33e-01	1
177	F08420+1015	1.78e-01	3	9.99e-02	1	1.53e-01	1
178	F08468−0315	2.49e-01	3	9.80e-02	1	1.71e-01	1
179	08491−0659	3.52e-01	3	2.50e-01	1	4.00e-01	1
180	08557+1203	1.10e+00	3	3.01e-01	1	4.00e-01	1
181	F08598+2439	2.26e-01	3	1.38e-01	1	1.34e-01	1
182	F09050+1052	2.53e-01	3	1.19e-01	1	1.85e-01	1
183	09053+5148	1.16e+00	3	2.46e-01	2	4.00e-01	1
184	09068+6343	1.11e+00	3	3.00e-01	1	4.00e-01	1
185	09099−0654	2.50e-01	3	2.50e-01	1	4.00e-01	1
186	F09105+4325	1.97e-01	3	1.01e-01	1	1.40e-01	1
188	F09204−0937	1.64e-01	3	6.83e-02	1	1.37e-01	1
192	10121−6607	6.23e-01	3	3.11e-01	1	4.00e-01	1
193	F10138+7118	1.95e-01	3	7.91e-02	1	1.08e-01	1
196	10205+6549	3.79e-01	3	2.50e-01	1	4.00e-01	1
200	F10478−0838	3.03e-01	3	1.75e-01	1	1.30e-01	1
203	F10579+6341	1.36e-01	3	1.09e-01	1	8.68e-02	1
205	11049−4222	4.16e-01	3	2.50e-01	1	4.00e-01	1
207	F11065+6728	2.74e-01	3	9.89e-02	1	1.60e-01	1
208	F11144−0651	3.02e-01	3	2.34e-01	1	1.95e-01	1
210	F11269+5700	1.43e-01	3	7.48e-02	1	1.27e-01	1
211	F11315+1117	2.14e-01	3	1.68e-01	1	1.59e-01	1
215	F11483+1233	2.12e-01	3	1.36e-01	1	2.23e-01	1
216	F12108+1032	3.03e-01	3	1.54e-01	1	1.90e-01	1
217	12132−1715	2.98e+00	3	6.63e-01	3	4.00e-01	1
218	F12168+2318	2.60e-01	3	1.57e-01	1	1.78e-01	1
222	F12262+2610	1.54e-01	3	8.13e-02	1	1.10e-01	1
223	F12263+2611	2.19e-01	3	1.46e-01	1	1.43e-01	1
224	F12284+2450	2.74e-01	3	1.95e-01	1	1.85e-01	1
225	F12325+1839	4.70e+00	3	1.09e+00	2	2.70e-01	3
228	F12371−3942	4.49e-01	3	2.38e-01	1	2.51e-01	1
230	12430+0756	8.64e-01	3	4.02e-01	1	4.00e-01	1
233	F12518+5613	8.89e+00	3	1.92e+00	3	3.70e-01	3
234	12536+3835	2.26e+00	3	5.83e-01	3	4.00e-01	1
238	F13143−4342	2.49e-01	3	1.23e-01	1	1.58e-01	1
241	F13198+4409	2.55e-01	3	9.18e-02	1	1.37e-01	1
242	13219+5511	6.56e+00	3	1.60e+00	3	4.21e-01	1
244	13316+0354	4.26e-01	3	3.32e-01	1	4.00e-01	1
245	F13320−1257	1.89e-01	3	2.85e-01	1	1.80e-01	1
246	F13385+5727	1.41e-01	3	6.84e-02	1	9.84e-02	1
248	F13447+5440	2.18e-01	3	8.29e-02	1	1.34e-01	1
249	13489−3244	7.05e-01	3	3.11e-01	1	4.00e-01	1
251	F14096+0238	2.71e-01	3	2.01e-01	1	1.98e-01	1
253	F14158−1828	2.23e-01	3	2.68e-01	1	3.69e-01	1
254	F14163−1308	7.62e-01	3	2.26e-01	2	1.44e-01	1
255	F14199−3917	3.98e-01	3	1.55e-01	1	2.14e-01	1
258	F14241+1927	4.34e-01	3	2.24e-01	1	1.34e-01	1
259	14383+1637	6.78e-01	3	2.50e-01	1	4.00e-01	1
260	14384−6445	4.07e+00	3	8.21e-01	3	4.23e-01	1
261	14465−1356	3.77e-01	3	7.36e-01	1	4.00e-01	1
262	14496−3735	2.83e-01	3	2.79e-01	1	4.00e-01	1
266	F15049−4023	1.72e-01	3	1.10e-01	1	1.96e-01	1
270	F15093−1936	5.04e-01	3	2.91e-01	1	3.13e-01	3
272	F15148−4052	1.83e-01	3	1.12e-01	1	2.22e-01	1
275	15257+2916	1.91e+00	3	4.93e-01	3	4.00e-01	1
279	F15297−1930	2.81e-01	3	2.19e-01	1	1.89e-01	1
280	15394+1300	2.90e-01	3	2.66e-01	1	4.00e-01	1
281	15396+1837	2.99e-01	3	2.50e-01	1	4.00e-01	1
282	F15414+5231	2.19e-01	3	6.79e-02	2	1.30e-01	1
283	15464+5531	3.08e-01	3	2.50e-01	1	4.00e-01	1
284	15483+0437	1.76e+00	3	5.04e-01	3	4.00e-01	1
285	15477−3328	1.05e+00	3	2.82e-01	1	4.67e-01	2
287	F15556−2441	2.52e-01	3	3.15e-01	1	9.27e-01	1
288	15594+2959	3.38e-01	3	2.50e-01	1	4.00e-01	1
289	16012+4610	3.69e-01	3	2.50e-01	1	4.00e-01	1
290	F16000−3827	2.79e-01	3	3.08e-01	1	3.85e-01	1
292	F16030−2328	2.00e-01	3	3.43e-01	2	1.77e+00	1
293	16029−4502	8.12e-01	3	2.50e-01	1	8.51e-01	1
296	16071+4503	8.46e-01	3	1.42e-01	2	4.00e-01	1
299	F16200−0157	1.79e-01	3	8.65e-02	1	2.06e-01	1
300	F16233+5518	2.14e-01	3	6.85e-02	1	1.19e-01	1
301	F16231+1408	5.79e-01	3	1.91e-01	3	1.81e-01	1
304	16250−0815	9.33e-01	3	3.93e-01	1	4.00e-01	1
306	16291−2121	7.61e-01	3	3.69e-01	1	4.00e-01	1
307	F16301+0537	1.88e-01	3	7.38e-02	1	2.53e-01	1
309	F16353−0626	2.97e-01	3	1.16e-01	1	4.29e-01	2
311	F16419+5546	1.48e-01	3	6.06e-02	2	1.08e-01	1
312	16415−6700	3.06e-01	3	2.50e-01	1	4.00e-01	1
313	16452+0520	3.35e-01	3	2.50e-01	1	4.00e-01	1
314	16477+4604	5.90e-01	3	2.50e-01	1	4.00e-01	1
316	F16546+4726	1.10e-01	3	6.46e-02	1	1.02e-01	1
317	F16592+1501	1.44e-01	3	8.13e-02	1	1.61e-01	1
321	17312+5512	9.56e-01	3	1.81e-01	3	4.00e-01	1
323	F17420+1425	2.38e-01	3	1.09e-01	1	1.93e-01	1
325	F17574+4528	7.35e-02	3	4.66e-02	1	1.06e-01	1
326	F17577+0037	2.01e-01	3	1.35e-01	1	2.98e-01	1
327	F18033+1159	1.97e-01	3	1.27e-01	1	2.22e-01	1
332	18214+7118	6.58e-01	3	1.37e-01	2	4.00e-01	1
338	F18347+3325	2.15e-01	3	9.42e-02	1	1.10e-01	1
339	F18371+6228	1.94e-01	3	5.34e-02	2	9.97e-02	1
340	F18385+3819	1.59e-01	3	8.90e-02	1	1.23e-01	1
341	18416+5529	3.85e-01	3	2.50e-01	1	4.00e-01	1
342	18430+3733	1.04e+00	3	3.34e-01	3	4.00e-01	1
343	F18434+2155	1.28e-01	3	8.61e-02	1	5.60e-01	1
349	F18532−3724	1.48e-01	3	1.63e-01	2	4.47e-01	1
353	19193+6418	2.50e-01	1	2.50e-01	1	7.90e-01	3
354	19243+3612	2.12e-01	3	1.02e+00	1	4.00e-01	1
355	F19297−4522	2.16e-01	3	1.27e-01	1	1.83e-01	1
357	F19329−2449	2.72e-01	3	1.61e-01	1	1.45e-01	1
358	19340+2228	4.93e-01	3	7.30e-01	3	2.36e+00	3
363	19484−4000	3.25e-01	3	8.25e-01	1	4.00e-01	1
365	F19507−0314	2.96e-01	3	8.83e-02	1	1.78e-01	1
367	19590+2736	9.08e-01	3	2.50e-01	1	5.72e-01	1
378	F20271+1955	1.38e-01	3	9.62e-02	1	2.86e-01	1
379	20322+7446	3.71e-01	3	2.50e-01	1	7.35e-01	1
381	20411+1453	1.36e+00	3	4.20e-01	3	4.00e-01	1
384	20499−0910	1.18e+00	3	2.90e-01	1	4.00e-01	1
388	21079+0955	9.88e-01	3	2.58e-01	2	4.00e-01	1
389	F21151−1811	1.93e-01	3	1.89e-01	1	1.52e-01	1
390	21175−4101	5.12e-01	3	2.50e-01	1	4.00e-01	1
391	F21241+1909	2.61e-01	3	1.17e-01	1	2.83e-01	1
392	21250+4837	3.81e-01	3	3.01e-01	1	4.74e-01	1
394	21373−1653	2.65e+00	3	6.65e-01	3	4.00e-01	1
395	F21404−1950	2.09e-01	3	1.29e-01	1	1.56e-01	1
397	F21442−1621	6.05e+00	3	1.43e+00	3	2.07e-01	3
401	22023+6423	1.75e+00	3	4.48e-01	3	1.05e+00	1
402	22022−0109	5.00e-01	3	2.83e-01	1	4.00e-01	1
413	22514+4429	4.12e-01	3	2.50e-01	1	4.00e-01	1
415	23243+0058	4.82e-01	3	3.05e-01	1	4.00e-01	1
417	F23261−6323	1.38e-01	3	6.16e-02	1	1.26e-01	1
418	F23292+2807	1.54e-01	3	1.07e-01	1	1.58e-01	1
420	F23303−3805	5.46e-01	3	1.39e-01	2	1.43e-01	1
421	23324−4253	8.15e-01	3	2.78e-01	1	4.00e-01	1
422	F23373+0923	2.17e-01	3	2.57e-01	1	2.85e-01	1
423	F23471+2833	2.44e-01	3	1.45e-01	2	1.56e-01	1
424	F23487−1911	2.15e-01	3	1.39e-01	1	1.45e-01	1

Download table as: ASCIITypeset images: 1 2 3 4

We also want to search the AKARI FIS (Kawada et al. 2007) counterparts of stars listed in Table 3. However, only four stars have the AKARI FIS counterparts, but no one has good data in more than twobands. Therefore, in the sections below, the AKARI FIS data are not discussed.

It is noted from Table 3 that 42 HgMn stars are included. To concentrate on Ap and Am stars, these HgMn stars are not included in the following discussion. In addition, from Table 3, it can be seen that some late Bp and early Bp stars are also included for the following discussion.

3.Two-color Diagram From 2MASS, WISE,and IRAS

By using 2MASS, WISE,and IRAS data from Tables 3 and 4, several two-color diagrams can be presented to show infrared properties for Ap and Am stars. In these two-color diagrams,if stars are located in the lower-left region, those stars have small or no infrared excesses and high color temperatures, while if stars are in the upper-right region, those stars have large infrared excesses and low color temperatures.

In order to show infrared properties clearly, the blackbody distributions and the power-law distributions are also presented in these two-color diagrams.

The power-law distribution is derived in such a way that in a certain wavelength range Δλ=λ₂-λ₁ (λ₁<λ₂), α is the spectral index, then

where m(λ₁) and m(λ₂) are magnitudes at wavelengths λ₁ and λ₂ respectively. S_λ1 and S_λ2 are absolute flux calibrations at wavelengths λ₁ and λ₂ respectively. For example, taking m(λ₁)—m(λ₂) as H–K and J–H,respectively, the power-law distribution can be determined in the 2MASS two-color diagram.

The blackbody distribution is derived according to the calculation of the Plank function in two wavelengths and a certain temperature around this wavelength interval, i.e.,

where B_λ1 and B_λ2 are the Plank functions with same temperature T at λ₁ and λ₂,respectively, and S_λ1 and S_λ2 are absolute flux calibrations at wavelengths λ₁ and λ₂ respectively. For example, taking m(λ₁)–m(λ₂) as H–K and J–H,respectively, the blackbody distribution can be determined in the2MASS two-color diagram.

In other two-color diagrams, similar procedures can be made to present the blackbody distribution and the power-law distribution.

Note that if stars are near the blackbody distribution in these two-color diagrams, the infrared radiations of those stars are mainly due to thermal emissions, while if stars are near the power-law distribution, the infrared radiations of those stars are mainly due to free–free emissions.

Note that in the following parts of this paper the Galactic extinction corrections are made for all 2MASS and WISE data according to the method mentioned in Section 2.

In addition, in these two-color diagrams, the distributions of the Ap star, the Am star, the late Bp star, and early Bp star are separately presented in order to clearly show their properties. Furthermore, all data points are shown with the error bars in the X axis and Y axis.

3.1.2MASS Two-color Diagram

The (J–H) versus (H–K) diagram is presented in Figure 1. It is seen from Figure 1 that (1) the majority of Am stars are located in the range of −0.1< H–K<0.1 and −0.1<J–H<0.2, while the majority of Ap stars are located in the range of −0.1<H–K<0.1 and −0.2<J–H<0.2. In addition, late Bp stars and early Bp stars are located in the range of −0.1<H–K<0.1 and −0.2<J–H<0.1. Thisimplies that no or little infrared excess can be found for these four groups of stars. Because Bessell & Brett (1988) pointed out that the average intrinsic colors are −0.04<H–K<0.03 and −0.05<J–H<0.09 for B and A stars, The result here is coincident with that from all previous works mentioned in Section 1.(2) Several Am stars are located in the region of H–K>0.2 and J–H>0.2,indicative of some infrared excesses, while almost no Ap stars and Bp stars are in this region. It implies that, statistically, infrared excesses for Am stars are larger than thosefor Ap and Bp stars. Nevertheless, over 90% ofAm, Ap, and Bp stars have no infrared excesses in the JHK bands.(3) Most Am stars and Ap stars, and almost all Bp stars, are around the power-law lines or located in the right-down region of the power-law lines. This implies that infrared radiations in the near-infrared from these stars are mainly dominated by free–free emissions.

A New Photometric Study of Ap and Am Stars in the Infrared (3)

3.2.WISE Two-color Diagrams

The (W2–W3) versus (W1–W2) diagram is presented in Figure 2. It can be seen from Figure 2 that (1) in the 3–12 μm region the majority of Am stars and Ap stars have very similar behavior, i.e., they are distributed in the region of −0.1<W1–W2<0.8 and −0.8<W2–W3<0.1, and the majority of late Bp stars are located in the region of −0.1<W1–W2<0.5 and −0.5<W2–W3<0.0,while the majority of early Bp stars are located in the region of −0.1<W1–W2<0.3 and −0.5<W2–W3<0.1. Thismeans that, in the W2–W3 color, they have no infrared excess while in the W1–W2 color more than half of theAp and Am stars, and several Bp stars have clear infrared excesses.(2) Over 40 Am stars, 20 Ap stars, and several Bp stars even have W1–W2>0.3 indicative of strong infrared excesses, because Bessell & Brett (1988) indicated that for A and B stars the average intrinsic color L (3.45 μm)–M (4.75 μm) is around 0.00–0.02. This result supports the previous suggestions by Groote & Kaufmann (1981, 1983, 1984), i.e., 60% of samples have the infrared excess in the M band (4.8 μm).(3) Most Am stars, Ap stars, and late Bp stars are located in the right-down region from the blackbody line indicative of their infrared radiations mainly due to thermal emissions, while most early Bp stars are in the left-upper region from the power-law distribution, indicative of their infrared radiations mainly due to free–free emissions.(4) The two Ap stars and three early Bp stars have strong infrared excess in the W2–W3 color with W2–W3>0.15 and located in the left-upper region from the power-law distribution indicative of strong free–free emissions.

A New Photometric Study of Ap and Am Stars in the Infrared (4)

The (W3–W4) versus (W2–W3) diagram is plotted in Figure 3. It is clearly shows that (1) for the majority of Am stars, Ap stars, and Bp stars,infrared excesses are not found in the W2–W3 color as already shown in Figure 2. However, several Am stars and about 40 Ap stars, 15 late Bp stars, and 3 early Bp stars show the infrared excesses with W3–W4>0.2, which is coincident with the result from Shylaja & Ashok (2002) in the similar wavelength region from IRAS. (2) Most Am stars, Ap stars, and Bp stars are located in the left-upper region from the power-law line indicative of the infrared radiation probably due to free–free emissions, while still some Am, Ap stars, and Bp stars are in the right-down region from the blackbody line indicative of their infrared radiations mainly from thermal emissions.(4) The distributions of these four groups of stars, in particular, the distributions of Ap stars and late Bp stars, in the (W3–W4) versus (W2–W3) diagram look rather strange. It can be seen that the majority of the sources have no infrared excess with the color dispersed in the region of −0.8 < W2–W3<−0.2 in the W2–W3 color and the W3–W4 colors are around 0.0, while for some sources with W2–W3>−0.2 their W3–W4 colors are spread in the broad range and some of them do have the infrared excess. These distributions are seenmore clearlyfor Ap and Bp stars. Thisimplies that most sources with the infrared excess in the 12–22 μm (the W3–W4 color) can be found in sources with redder W2–W3 color (though they have no the infrared excess in the W2–W3 color).

A New Photometric Study of Ap and Am Stars in the Infrared (5)

3.3.IRAS Two-color Diagram

From Table 4, it can be seen that only six stars have all good data in 12, 25, and 60 μm;therefore, 46 stars with good data in 12 and 25 μm and upper limit data in 60 μm are also employed to make analyses.

The ([25]–[60]) versus ([12]–[25]) diagram is presented in Figure 4. In Figure 4, the bold circle indicates the star with good quality data in all 12, 25, and 60 μm, while the thin circle without the error bar in the Y axis indicates the star with good quality data in 12 and 25 μm but upper limit data in 60 μm. It is seen from Figure 4 that (1) the three Am stars, one Ap star, and one late Bp star with good data in 12, 25, and 60 μm are distributed around the color [12]–[25] = 0.0 and the color [25]–[60] = 0.0. According to van der Veen & Habing (1988), these stars are non-variable starswithout the circ*mstellar shell and the infrared excess.(2) The one Ap star is located in the upper region with [12]–[25]>1.0 and [25]–[60] around 3.0. According to van der Veen & Habing (1988), this star is a variable star with relatively hot dust close to the star and relatively cool dust at large distances.(3) For a small number of Am, Ap, and late Bp stars with upper limit values in the 60 μm the [12]–[25] colors show some infrared excesses with the [12]–[25]>1.0 which is also seen in Figure 3 in the similar color W3–W4. However, no certain results can be obtained in the [25]–[60] colors for stars without good data in the 60 μm, because these stars have only upper limit values in the 60 μm.(4) Most Am, Ap, and Bp stars with upper limit values in the 60 μm are located in the region of [12]–[25]<1.0. It means that they have no infrared excesses in the [12]–[25] color, and probably also no infrared excesses in the [25]–[60] color.

A New Photometric Study of Ap and Am Stars in the Infrared (6)

4.Discussions About the Stars with Infrared Excesses

4.1.The Stars with the Infrared Excess in the W1–W2 Color

As shown in Section 3.2 and Figure 2, we found that many Ap and Am stars indeed have the infrared excesses in the W1–W2 color. This result supports the conclusion by Groote & Kaufmann (1981, 1983, 1984): many Ap and Am stars have infrared excess in the M band (4.8 μm). However, Groote & Kaufmann (1984) also pointed out that the reason for sources with the infrared excess in the M band is still unknown. Even up to now, no one has discussed the reason forthe infrared excess in the M band for these Ap and Am stars.

In order to reveal the reason of the infrared excess in W1–W2 color for some Ap and Am stars, we have taken the stars with W1–W2>0.1 (in fact, W1o–W2o, i.e., after the Galactic extinction correction) and listed them in Table 5 in which 75 Ap stars (including Bp stars) and 69 Am stars (including Fm stars) are presented. The columns in Table 5 are(1) the star number, the HD number, and the spectral classification,(2) the magnitudes in W1, W2,and W3 bands, and the Galactic extinction coefficient Av from Table 3,(3) the derived (W1–W2)o,and(4) the wavelength with the peak infrared excess, λpeak, and the average infrared excess within 2–60 μm from the Infrared excesses in Hipparcos stars by McDonald et al. (2012). In addition, we collected some information from the references listed in this table to check the status of the stars listed.

Table 5.Ap and Am Stars with (W1–W2)o>0.1 in This Paper

								Lambda (peak) IRE		References for the Binary/Multiplicity/Debris Disk
No.	HD	Sp.	W1	W2	W3	Av	(W1–W2)o
								(Micron)	(2–60 μm)	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
Ap stars (75 stars in total)

013	3980	A3VpSrCr	5.607	5.471	5.654	0.697	0.126	2.1	0.000	y	y	y		y
017	5737	B7IIIp	4.648	4.353	4.778	0.040	0.294	8.6	1.164	y
031	11502	B9Vp	4.705	4.253	4.818	0.223	0.449	4.6	0.849	y	y	y			y
033	11415	B3IIIp	3.815	3.398	3.913	0.291	0.413	4.6	1.104	y
036	12446	A2Vp	3.646	3.177	3.766	0.000	0.469	2.1	0.853	y	y	y			y
039	12767	A0IIIpSi	5.136	4.804	5.158	0.000	0.332	11.5	1.117	y
043	15089	A5IIIpSr	3.834	3.357	4.063	0.000	0.477	4.6	1.233	y	y	y		y	y
049	18296	B8VpSiSr	5.217	5.066	5.368	0.366	0.145	4.6	0.935	y
058	22470	B9VSi	5.540	5.379	5.657	0.000	0.161	4.6	1.148	y	y	y			y
061	22920	B9IIIpSi	5.934	5.834	5.999	0.000	0.100	4.6	1.001	y
062	23408	B8IIIp	3.919	3.524	3.796	0.291	0.391	4.6	2.445	y	y
066	24712	A9IIIpSrEu	5.316	4.983	5.289	0.285	0.329	4.6	1.264
067	25267	A0IIIpSi	4.830	4.581	4.954	0.000	0.249	4.6	0.986	y			y
071	26571	B8IIIpSi	5.557	5.440	5.653	0.112	0.115	4.6	0.986
073	27295	B9IVp	5.654	5.540	5.671	0.081	0.112	4.6	1.081	y			y					y	y
074	27309	A0VpSi	5.789	5.645	5.821	0.000	0.144	4.6	1.003	y
083	28843	B9IIIpSi	6.242	6.105	6.165	0.000	0.137	4.6	1.071	y	y	y
085	29305	A0IIIpSi	3.471	2.906	3.566	0.524	0.558	4.6	1.111	y	y	y			y			y	y
094	32549	A0IVpSiCr	4.704	4.369	4.771	0.118	0.333	4.6	1.191	y
104	34452	B9VpSi	5.877	5.736	5.952	0.000	0.141	4.6	1.033	y
108	35497	B7IIIpCr	2.385	2.083	1.940	0.223	0.298	/	/	y	y	y
120	38104	A1IVpCr	5.331	5.178	5.384	0.236	0.149	4.6	0.991	y
125	40321	A0IIIpSi	3.119	2.146	2.595	0.071	0.972	4.6	0.870	y
126	40394	A1VpSi	5.589	5.438	5.654	0.081	0.149	4.6	0.979	y
146	54118	A0Si	5.288	5.100	5.383	0.043	0.187	8.6	1.053	y
148	55719	A3V?pSr	5.115	4.893	5.207	0.195	0.219	4.6	0.996	y	y	y	y		y
156	64740	B2Vp	5.361	5.221	5.483	0.037	0.139	2.1	0.927	y
165	68351	A0VpSiCr	5.646	5.534	5.740	0.202	0.109	4.6	0.901	y			y						y
186	79158	B9IIIpSi	5.577	5.457	5.687	0.000	0.120	4.6	0.962	y	y
189	83368	A8VpSrCrEu	5.523	5.353	5.557	0.273	0.166	12.1	4.267		y	y			y
196	89822	A1:VpSiSr	5.032	4.744	5.072	0.000	0.288	4.6	1.001	y			y						y
205	96616	A2IIIpSrSi	4.948	4.675	5.029	0.081	0.271	12.0	2.275	y	y	y			y
207	96707	A7IVpSr	5.478	5.344	5.537	0.171	0.131	4.6	1.224
213	101189	A0IVCrY	5.134	4.856	5.258	0.202	0.275	4.6	1.016	y								y
223	108662	A0IVpCrSrEu	5.305	5.135	5.395	0.081	0.168	2.1	0.962	y	y	y	y
224	108945	A3IIIpSr	5.262	5.069	5.333	0.118	0.193	8.6	1.025	y			y						y
228	110073	B8.5IV	4.761	4.505	4.887	0.158	0.253	4.6	1.003	y	y					y
233	112185	A1VpCrEu	2.391	1.948	1.850	0.167	0.441	4.3	1.039	y	y	y
234	112413	A0VpSiEu	3.898	3.088	3.773	0.000	0.810	/	/	y	y	y			y
244	118022	A0VpSrCr	4.879	4.617	4.966	0.288	0.257	8.6	1.164	y				y
249	120709	B5IVp	4.606	4.272	4.334	0.115	0.333	4.6	1.882	y	y	y	y					y	y
251	124224	A0IVpSi	5.300	5.145	5.405	0.000	0.155	4.6	1.010	y	y	y
255	125823	B5IIIp	5.021	4.735	5.098	0.000	0.286	4.6	1.284	y				y
260	128898	A9VpSrCrEu	2.846	1.559	2.630	0.255	1.283	4.2	1.054	y	y	y					y
261	130559	A0III:spSrCr	5.102	4.875	5.190	0.000	0.227	4.6	1.337	y	y	y			y
262	131120	B7IIIp	5.445	5.308	5.560	0.000	0.137	4.6	1.209	y	y
270	134759	B9IVpSi	4.688	4.317	4.811	0.065	0.370	4.6	1.385	y	y	y	y
275	137909	A8IIIpSrCrEu	3.441	2.575	3.264	0.388	0.860	4.6	0.900	y	y	y	y						y
280	140160	A2VpSrEu	5.232	4.970	5.258	0.146	0.259	4.6	1.463	y
282	140728	A0VpSiCr	5.583	5.435	5.651	0.000	0.148	2.1	0.000	y
290	143699	B6IVp	5.255	5.151	5.440	0.084	0.102	4.6	1.019	y
299	147550	B9VpSi	6.064	5.886	6.017	0.477	0.171	4.6	1.341
300	148330	A2IIIpSiSr	5.698	5.591	5.773	0.000	0.107	4.6	0.988	y
301	148112	A0IVpCrEu	4.479	4.068	4.578	0.198	0.408	4.6	1.084	y	y	y
306	148898	A7VSrCrEu	4.121	3.661	4.193	0.078	0.459	4.6	1.037	y
312	150549	A0Vp	5.248	5.115	5.361	0.000	0.133	4.6	1.007	y	y	y
313	151525	B9.5VpCrEu	5.025	4.779	5.142	0.195	0.243	4.6	1.007	y	y	y
314	152107	A3VpSrCrEu	4.563	4.185	4.624	0.295	0.373	4.6	1.189	y	y	y		y
326	164258	A6VpSrCr	5.923	5.820	5.962	0.093	0.101	8.6	1.001		y
332	170000	A0VpSi	4.421	3.992	4.500	0.155	0.427	4.6	0.978	y	y	y	y		y				y
334	170397	A2IIIpSrSi	6.010	5.883	6.073	0.000	0.127	4.6	1.052
350	176232	A6IIIpSr	5.291	5.084	5.366	0.431	0.200	4.6	1.015	y
354	183056	B9.5IIpSi	5.433	5.281	5.531	0.000	0.152	4.6	0.991	y	y		y						y
355	183806	A0VpSrCr	5.504	5.332	5.585	0.049	0.171	4.6	1.041	y
364	187474	A0IV:EuSrSi	5.434	5.295	5.555	0.000	0.139	4.6	0.996	y
366	188041	A5IIIpSrCrEu	5.574	5.319	5.576	0.313	0.250	4.6	0.993	y
380	196502	A2IVpSrCrEu	5.040	4.785	5.096	0.307	0.250	4.6	1.369	y
382	197461	A7IIIp	3.610	2.977	3.630	0.422	0.627	12.0	1.355	y
389	201601	A9VpSrCrEu	4.112	3.539	4.137	0.228	0.570	/	/	y	y	y			y		y
391	203006	A7VpSrCrEu	4.616	4.308	4.713	0.110	0.306	2.1	0.000	y	y	y
393	204411	A5IIIpCrSrEu	5.019	4.767	5.059	0.000	0.252	12.0	2.118	y
395	206088	F0IIIpSr	2.957	2.275	3.020	0.264	0.679	/	/	y		y
401	209515	A0IVCrSi	5.553	5.411	5.596	0.009	0.141	8.6	1.020	y	y	y			y
416*	220825	A1VpSrCrSi	4.949	4.670	4.951	0.223	0.275	/	/	y	y	y		y
422	221760	A2VpSrCrEu	4.354	3.985	4.485	0.267	0.365	2.1	0.980	y	y	y

Am Stars (69 Stars in Total)

012	3883	A5m	5.455	5.333	5.514	0.533	0.114	2.1	0.000		y	y
023	8374	A0Vm	4.999	4.658	5.020	1.042	0.327	4.6	1.373	y			y	y
037	12447	A3Vm	3.646	3.177	3.766	0.682	0.459	2.1	0.853	y	y	y			y
040	12869	A1/2Vm	4.748	4.434	4.815	0.521	0.307	4.6	1.365	y			y	y
053	20320	A7Vm	4.156	3.564	4.196	0.353	0.587	4.6	1.128	y	y		y	y		y
054	20210	A2m	5.573	5.451	5.631	0.889	0.109	4.6	1.028		y	y	y						y
063	23277	A2m	5.173	4.965	5.243	0.329	0.203	4.6	1.113	y			y
070	25425	A4Vm	5.788	5.683	5.814	0.205	0.102	4.6	1.015
072	27045	A7m	4.331	3.950	4.400	0.493	0.374	4.6	1.109	y	y	y		y
076	27411	A3m	5.477	5.327	5.539	0.889	0.137	4.6	1.189
077	27628	A9Vm	4.919	4.691	4.995	0.118	0.226	4.6	1.123	y	y	y	y
078	27749	A7Vm	4.908	4.575	4.981	0.561	0.325	4.6	1.150	y			y
079	27962	A1Vm	4.263	3.666	4.188	0.254	0.593	4.6	1.126	y	y	y		y	y
080	28226	A8Vm	5.096	4.729	5.092	0.507	0.360	4.6	1.056	y	y	y		y
081	28355	A7Vm	4.576	4.037	4.566	0.201	0.536	4.6	1.565	y
082	28546	A1IV/Vm	4.885	4.612	4.954	0.034	0.272	4.6	1.113	y	y	y	y	y
086	29140	A7Vm	3.768	3.096	3.809	0.130	0.671	4.6	1.058	y	y	y	y	y	y
087	29499	A7Vm	4.802	4.395	4.841	0.434	0.401	4.6	1.430	y	y	y
088	29479	A5Vm	4.803	4.511	4.867	0.084	0.290	4.6	1.020	y		y	y	y
089	30210	A7Vm	4.942	4.564	5.005	0.198	0.375	4.6	1.186	y	y	y
090	30121	A8IVbm	4.732	4.302	4.760	0.205	0.428	4.6	1.227	y	y	y		y	y
093	30453	A4m	5.236	4.976	5.285	0.184	0.257	4.6	1.017	y	y	y	y						y
097	32964	A0Vm	5.212	4.986	5.279	0.127	0.224	4.6	1.110	y	y	y	y					y	y
098	33254	A8IVm	4.882	4.651	4.933	0.087	0.229	4.6	1.668	y	y	y	y	y
099	33204	A9Vm	5.157	4.349	5.257	0.031	0.807	4.6	2.126	y	y	y	y		y
102	33641	A7IVbm	4.426	3.847	4.433	0.248	0.576	4.6	1.018	y	y			y
111	36060	A5m	5.319	5.128	5.372	0.415	0.185	4.6	1.133	y	y	y
124	40536	A6IIIm	4.707	4.259	4.668	0.208	0.445	4.6	1.000	y			y
127	40932	A4Vm	3.737	3.122	3.822	0.223	0.612	4.6	0.989	y	y	y	y	y	y
129	41357	A7IVm	4.845	4.448	4.794	0.446	0.391	4.6	1.101	y			y						y
130	42078	A2m	5.550	5.439	5.634	0.753	0.100	4.6	1.693
135	44691	A7m	4.982	4.739	5.033	0.313	0.238	4.6	1.694	y			y						y
136	46052	A4Vm	5.615	5.346	5.578	0.226	0.265	4.6	1.413	y			y
163	67523	F5IVm	2.108	1.688	1.661	0.526	0.413	4.6	1.311	y	y	y
167	71262	A7Vm	5.486	5.343	5.575	0.181	0.140	8.6	1.092
169	72037	A0Vm	5.091	4.696	5.059	0.818	0.384	4.6	1.161	y				y
172	71973	A2m	5.559	5.396	5.559	1.057	0.148	4.6	1.226		y	y	y		y
179	75737	A2/3Vm	5.177	4.948	5.223	0.381	0.223	12.0	1.400	y	y	y	y		y
180	76756	A5Vm	3.689	3.154	3.955	0.112	0.534	12.0	1.254	y	y	y
183	78209	F0IVm	3.787	3.187	3.899	0.327	0.595	4.6	0.882	y	y
184	78362	A3/4IIIm	3.936	3.510	3.952	0.321	0.422	4.6	1.014	y	y	y	y
192	88981	A7m	4.622	4.202	4.640	0.260	0.417	4.6	1.019	y
200	93903	A3Vm	5.376	5.126	5.390	0.434	0.243	8.6	1.127	y	y	y	y
214	102660	A2m	5.383	5.223	5.426	0.893	0.147	2.1	0.000				y	y
216	106251	A3m	5.253	5.032	5.264	0.753	0.210	/	/	y				y
230	110951	A2IIIm	4.399	4.053	4.486	0.344	0.341	/	/	y			y
238	115331	A3V?m	5.402	5.254	5.487	0.632	0.139	4.6	1.252	y
241	116303	A8IIIm	5.614	5.449	5.651	0.420	0.159	8.6	1.068		y	y
254	125337	A3Vm	4.230	3.698	4.264	0.338	0.528	4.6	1.243	y	y		y	y
258	126661	A8IIIm	4.847	4.551	4.896	0.489	0.289	4.6	1.070	y	y
279	138413	A2IV	5.086	4.897	5.192	0.586	0.180	4.6	1.356	y				y
281	140232	A8Vam	5.259	5.067	5.327	0.087	0.190	4.6	1.023	y	y			y
283	141675	A8IVam	5.265	5.096	5.345	0.195	0.166	8.6	1.042	y	y	y			y
284	141795	A2Vm	3.453	2.867	3.488	0.474	0.579	/	/	y
293	144197	F0IIIm	4.287	3.752	4.315	0.264	0.532	4.6	1.029	y
304	148367	A5IVm	4.226	3.586	4.156	0.429	0.634	4.6	1.139	y	y	y	y	y	y
320	159541	A8Vm	4.411	3.719	4.267	0.526	0.685	/	/	y		y	y
321	159560	A4IVm	4.112	3.757	4.195	0.393	0.350	/	/	y	y	y	y	y					y
323	161321	A5m	5.681	5.559	5.748	0.322	0.117	4.6	0.984		y	y	y
342	173648	A7IVm	3.891	3.267	3.916	0.295	0.619	4.6	1.037	y	y	y	y	y
358	184552	A7Vm	5.168	5.052	5.320	0.167	0.113	4.6	1.036	y			y						y
368	189849	A5III	4.174	3.612	4.182	0.198	0.559	8.6	1.219	y
385	198743	A8Vm	3.980	3.387	4.015	0.606	0.584	8.6	1.119	y	y	y	y
392	204188	A8m	5.516	5.353	5.562	0.146	0.160	12.0	1.985				y	y		y			y
398	207088	A5IIIm	2.290	1.596	2.132	0.149	0.692	/	/	y				y
402	209790	A6Vm	3.250	2.525	3.391	0.763	0.715	12.0	1.378	y	y	y	y		y
403	209625	A8IVm	4.758	4.542	4.822	0.220	0.212	8.6	0.990	y			y
414	216608	A3Vm	4.990	4.775	5.063	0.893	0.202	8.6	1.029	y	y	y	y	y	y				y
424	223461	A5II-III	5.478	5.284	5.546	0.257	0.190	2.1	0.000

Note. References for the binary/multiplicity/debris disk.(1) Eggleton & Tokovinin (2008): multiplicity. (2) Mason et al. (2001–): double and multiple. (3) Dommanget & Nys (2002): double and multiple. (4) Pourbaix et al. (2004–): spectroscopic binary. (5) De Rosa et al. (2014): multiplicity. (6) ESA (1997): double and multiples. (7) Trilling et al. (2007): debris disk. (8) Marion et al. (2014): binary. (9) Schöller et al. (2010): binary and multiplicity. (10) Ducati et al. (2011): spectroscopic binary.

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The important result we found is that, except for one star (No.066=HD 24712), all stars with W1–W2>0.2 in Table 5 are listed in theA catalog of multiplicity among bright stellar systems by Eggleton & Tokovinin (2008) or in the references listed below: Hiparcos and Tycho Catalogs: Double and Multiples (ESA 1997), The Washington Visual Double Star Catalog (Mason et al. 2001–), Catalog of Components of Double and Multiple stars (Dommanget & Nys 2002), The Ninth Catalog of Spectroscopic Binary Orbits (Pourbaix et al. 2004–), Trilling et al. (2007), Schöller et al. (2010), Ducati et al. (2011), Marion et al. (2014), and De Rosa et al. (2014). This result indicates that, except for the source, No. 066, all stars with W1–W2>0.2 (including 42 Ap stars and 51 Am stars) are in the binary system, the multiplicity system or the debris disk system. The status of the sources with 0.1<W1–W2<0.2 is that 26 Ap stars, out of 30 and 13 Am stars, out of 18, are listed in the reference above. This result also indicates that those 26 Ap stars and 13 Am stars are also in the binary system, the multiplicity system or the debris disk system. Therefore, we founda total of68 Ap stars and 64 Am stars to be in the binary system, the multiplicity system or the debris disk system from the W1–W2 color.

On the other hand, we also checked Ap and Am stars with W1–W2≤0.0, i.e., these stars have noinfrared excess. We found that none of thesestars arelisted in theA catalog of multiplicity among bright stellar systems and other references mentioned above.

Therefore, we can conclude that the reason of the infrared excess in W1–W2 color for some Ap and Am stars is mainly due to the influence from the binary,the multiplicity, or the debris disk. From Table 5, it is seen that the majority of Ap and Am stars have the wavelength with the peak infrared excess at 4.6 μm (the WISE W2 band), which again confirmed the conclusion of the infrared excess in M band by Groote & Kaufmann (1981), Groote & Kaufmann (1983), andGroote & Kaufmann (1984).

4.2.The Stars with the Infrared Excess in the J–H Color

We also checked the status for 15 Ap stars and 21 Am stars with J–H>0.1 (in fact, Jo–Ho, i.e., after the Galactic extinction correction). The result is listed in Table 6. The structure of Table 6 is the same as that of Table 5. It is seen that only one Ap star, No.407=HD 21363 is not listed in the references above. It means that their infrared excess in the near-infrared is also mainly attributed to the multiplicity/binary/debris disk. In addition, it can be seen from Table 6 that the majority of Ap/Am stars with the infrared excess in the near-infrared also have the infrared excess in the W1–W2 color.

Table 6.Ap and Am Stars with (J–H)o>0.1 in This Paper

								Lambda(peak) IRE		References for the Binary/Multiplicity/Debris Disk
No.	HD	Sp.	J	H	K	Av	(J–H)o
								(Micron)	(2–60 μm)	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)

Ap Stars (15 Stars in Total)

036*	12446	A2Vp	3.750	3.579	3.615	0.000	0.171	2.1	0.853	y	y	y			y
039*	12767	A0IIIpSi	5.166	5.047	5.014	0.000	0.119	11.5	1.117	y
151	59435	A6IIIpSrCrEu	6.828	6.506	6.387	1.032	0.219	8.6	1.082				y
235	112381	A0pSi	6.337	6.224	6.090	0.009	0.112	4.6	1.135		y	y			y
244*	118022	A0VpSrCr	5.184	4.980	4.879	0.288	0.175	8.6	1.164	y				y
255*	125823	B5IIIp	5.172	4.985	4.922	0.000	0.187	4.6	1.284	y				y
314*	152107	A3VpSrCrEu	4.775	4.580	4.572	0.295	0.165	4.6	1.189	y	y	y		y
327	165474	A6VpSrCrEuSi	6.323	6.171	6.165	0.477	0.104	12.0	1.804		y	y			y
380*	196502	A2IVpSrCrEu	5.201	5.056	5.032	0.307	0.114	4.6	1.369	y
382*	197461	A7IIIp	3.898	3.744	3.831	0.422	0.112	12.0	1.355	y
389*	201601	A9VpSrCrEu	4.276	4.105	4.008	0.228	0.148	/	/	y	y	y			y		y
395*	206088	F0IIIpSr	3.289	3.065	3.065	0.264	0.197	/	/	y		y
407	213637	F1pEuSr	8.760	8.562	8.543	0.595	0.139	/	/
416*	220825	A1VpSrCrSi	5.316	4.984	4.901	0.223	0.309	/	/	y	y	y		y
422*	221760	A2VpSrCrEu	4.558	4.368	4.465	0.267	0.163	2.1	0.980	y	y	y

Am Stars (21 Stars in Total)

037*	12447	A3Vm	3.750	3.579	3.615	0.682	0.103	2.1	0.853	y	y	y			y
040*	12869	A1/2Vm	5.221	4.737	4.739	0.521	0.432	4.6	1.365	y			y	y
053*	20320	A7Vm	4.419	4.255	4.224	0.353	0.129	4.6	1.128	y	y		y	y		y
072*	27045	A7m	4.785	4.577	4.361	0.493	0.159	4.6	1.109	y	y	y		y
081*	28355	A7Vm	4.793	4.656	4.533	0.201	0.117	4.6	1.565	y
082*	28546	A1IV/Vm	5.458	4.967	4.902	0.034	0.487	4.6	1.113	y	y	y	y	y
087*	29499	A7Vm	5.179	4.927	4.808	0.434	0.209	4.6	1.430	y	y	y
090*	30121	A8IVbm	5.107	4.769	4.724	0.205	0.317	4.6	1.227	y	y	y		y	y
127*	40932	A4Vm	3.730	3.598	3.637	0.223	0.109	4.6	0.989	y	y	y	y	y	y
129*	41357	A7IVm	5.085	4.939	4.756	0.446	0.101	4.6	1.101	y			y						y
135*	44691	A7m	5.471	5.065	4.993	0.313	0.375	4.6	1.694	y			y						y
184*	78362	A3/4IIIm	4.068	3.933	3.963	0.321	0.103	4.6	1.014	y	y	y	y
211	100518	A5Vm	6.153	6.024	5.986	0.198	0.109	8.6	1.186		y	y	y		y
230*	110951	A2IIIm	4.797	4.611	4.466	0.344	0.151	/	/	y			y
258*	126661	A8IIIm	5.159	4.940	4.869	0.489	0.170	4.6	1.070	y	y
293*	144197	F0IIIm	4.519	4.284	4.267	0.264	0.208	4.6	1.029	y
320*	159541	A8Vm	4.831	4.578	4.243	0.526	0.200	/	/	y		y	y
321*	159560	A4IVm	4.760	4.500	4.158	0.393	0.221	/	/	y	y	y	y	y					y
385*	198743	A8Vm	4.287	4.077	3.961	0.606	0.150	8.6	1.119	y	y	y	y
392*	204188	A8m	5.677	5.487	5.506	0.146	0.175	12.0	1.985				y	y		y			y
398*	207088	A5IIIm	2.253	2.062	2.013	0.149	0.176	/	/	y				y

Note. (1) The source with "∗" is listed in Table 5. (2) The reference notes are the same as those of Table 5.

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4.3.The Stars with the Infrared Excess in the W3–W4 Color

It can be seen from Figure 3 that many Ap and late Bp stars and some Am and early Bp stars have the infrared excess in the W3–W4. In order to check the status for these stars, we have taken the samples with W3–W4>0.3 in which 33 Ap stars and three Am stars are included. All stars with W3–W4>0.3 are listed in Table 7. The structure of Table 7 is the same as that ofTable 5. It is found that 17 Ap starsout of 33 and two Am starsout of threeare listed in the references above also indicating the infrared excess due to the multiplicity or the binary. In addition, 16 Ap stars and one Am starare not listed in the references above. The results may imply that their infrared excess beyond 12 μm is not mainly due to the influence from the binary/multiplicity. As Shylaja & Ashok (2002) pointed out, their infrared excesses in these wavelengths are possibly due to the circ*mstellar dust.

Table 7.Ap and Am stars with (W3–W4)o>0.3 in This Paper

								Lambda (peak)	IRE	References for the Binary/Multiplicity/Debris Disk
No.	HD	Sp.	W2	W3	W4	Av	(W3–W4)o
								(Micron)	(2–60 μm)	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)

Ap star (33 Stars in Total)

006	965	A5pSrSi	8.113	8.119	7.666	0.936	0.453				y
069	25823	A0IIpSrSi	5.325	5.475	4.681	0.102	0.794			y			y
092	30466	A0pSi	6.867	6.558	5.580	0.456	0.978				y
116	37058	B3VpSr	7.816	6.917	2.854	0.260	4.063				y	y
117	37479	B2Vp	6.899	6.658	4.055	0.446	2.603			y	y	y
118	37776	B2IVp	7.454	6.203	2.485	0.301	3.718
123	39317	A0VpSiSrCr	5.455	5.577	5.182	0.000	0.395			y
152	60435	A3pSrEu	8.459	8.594	8.149	0.660	0.445
166	70331	B8II/IIIp:Si	9.150	9.000	8.091	0.298	0.909
168	71866	A2VpSrSi	6.707	6.698	6.379	0.319	0.319
231	CPD-55 5216	A3VpCr	8.265	8.329	7.845	0.002	0.484				y	y
234*	112413	A0VpSiEu	3.088	3.773	3.048	0.000	0.725			y	y	y			y
249*	120709	B5IVp	4.272	4.334	3.754	0.115	0.580	4.6	1.882	y	y	y	y				y	y
253	125248	A2VspSrCrEu	5.790	5.940	5.623	0.025	0.317			y			y				y
256	125630	A2pSrSi	6.713	6.721	6.403	0.369	0.318
257	126515	A2VpSrSiCr	7.156	7.185	6.825	0.056	0.361
277	137949	F0VpEuCrSr	6.220	6.250	5.935	0.313	0.315				y
278	137509	A0SiCrFe	7.275	6.901	5.528	0.019	1.373	22.0	2.024
291	143939	B9IIIpSiCrEu	7.019	7.046	6.478	0.105	0.568				y	y
292	144334	B8Vp	5.849	5.958	5.590	0.164	0.368			y	y
298	147010	B9III/IVpSiFe	6.698	6.688	5.178	0.871	1.510				y	y
310	150035	A5pSrCr	7.730	7.718	7.124	0.578	0.594	4.6	1.178
315	152308	A0:IVpCrEu	6.551	6.499	6.042	0.099	0.457	22.0	1.037
333	168733	B8.5IIpSrTi	5.883	6.073	5.706	0.000	0.367			y
334*	170397	A2IIIpSrSi	6.481	6.552	6.325	0.028	0.227	4.6	1.052
349	175362	B8IVpSi	5.718	5.844	5.337	0.000	0.507	8.6	1.090	y
356	184927	B2Vp	8.068	8.046	7.126	0.288	0.920
362	186205	B3Vp	8.481	8.506	7.627	0.856	0.879
365	187473	B9pSrCrSi	7.489	7.527	7.107	0.236	0.420
373	191742	A5pSrCr	7.749	7.686	7.130	0.301	0.556
387	200311	B9pSiCr	8.005	8.198	7.480	0.009	0.718
409	215038	A0pSi	8.256	8.209	7.909	0.254	0.300	22.0	1.048
411	216018	A9VpSrCrEu	7.312	7.343	6.817	0.202	0.526
416#	220825	A1VpSrCrSi	4.670	4.951	4.524	0.223	0.427			y	y	y		y

Am star (3 Stars in Total)

173	73174	A2IV/Vm	7.260	7.313	7.004	0.000	0.309				y	y	y
344	173654	A6Vm	5.376	5.549	5.099	0.074	0.450			y	y	y	y					y
379	195217	A4m	5.986	6.048	5.693	0.409	0.355

Note. (1) The source with "∗" is listed in Table 5. (2) The source with "#" is listed in Table 6. (3) The reference notes are the same as for Table 5.

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5.Discussion on the Probability of the Binary/Multiplicity

From Section 4,we can seethat due to the multiplicity/binary/debris disk, 99 Ap stars and 87 Am stars have the infrared excesses in the 2MASS and/or WISE bands. Thus it can clearly be seen that the probability of being the binary/multiplicity system for Am stars is much higher than that for Ap stars. Because 268 Ap stars (including Bp stars) and 116 Am stars (including Fm stars) are listed in Table 3 in this paper, the probability of being the binary/multiplicity for Ap stars and Am stars are 37% and 75% respectively. It can be seen that the probability of being the binary/multiplicity for Am stars is double, such as for Ap stars. In comparison, some previous estimation of being the binary/multiplicity for Ap stars and Am stars is shown in Table 8. It is seen that our results are higher than previous ones.

Table 8.The Previous Results of Being the Binary/Multiplicity for Ap Stars and Am Stars

Star Number	Binary/Multiplicity Percentage	Reference
Am Star

123	55	Seggewiss (1993)
86	60	North et al. (1998)
295	54	Debernardi (2000)
91	63	Carquillat & Prieur (2007)

Ap Star

264	21	Gerbaldi et al. (1985)
30	15	Seggewiss (1993)
100	27	North et al. (1998)
113	30	Carrier et al. (2002)

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6.Relations between Infrared Colors and Spectral Types

Groote & Kaufmann (1981) observed 82 Ap/Bp stars in JHKLM bands and declared that the infrared excess in the M band appears more frequently for earlier type stars and there is a decrease of the maximum excess with the spectral type from B0 to F0.

To check this result, we attempt to find possible relations between infrared colors and spectral types for Ap/Am stars, not only in theM band, but also in all bands we studied in this paper.

The diagrams of the spectral type versus the J–K color are presented in Figure 5 for Am stars in the left panel and for Ap stars in the right panel respectively. It can be seen from Figure 5 that the J–K color appears to increase for the late Ap stars, but not for Am stars. As Bessell & Brett (1988) show, this is a normal result for the intrinsic colors of stars. In addition, no relation between the maximum excess and the spectral type can be found for Ap stars and Am stars.

A New Photometric Study of Ap and Am Stars in the Infrared (7)

The diagrams of the spectral type versus the W1–W2 color are presented in Figure 6 for Am stars in the left panel and for Ap stars in the right panel respectively. It can alsobe seen from Figure 6 thatno relation between the W1 (3.4 μm)—W2 (4.6 μm) color and thespectral type can be found foreitherAp stars or Am stars. This result is contrary to the result from Groote & Kaufmann (1981).

A New Photometric Study of Ap and Am Stars in the Infrared (8)

The diagrams of the spectral type versus the W2–W3 color are presented in Figure 7 for Am stars in the left panel and for Ap stars in the right panel respectively. It can be seen from Figure 7 that, statistically, no relation between the W2–W3 color and the spectral type can be found either for Ap stars or Am stars. However, the maximum infrared color appearsin the earlier type stars for Ap stars,whilethe minimum infrared color appearsin later type stars for Am stars.

A New Photometric Study of Ap and Am Stars in the Infrared (9)

The diagrams of the spectral type versus the W3–W4 color are presented in Figure 8 for Am stars in the left panel and for Ap stars in the right panel respectively. It can be seen from Figure 8 that, statistically, no relations between the W3–W4 color and the spectral type can be found either for Ap stars or Am stars. It is only worth to note that for Ap stars the earlier type ones have larger infrared colors.

A New Photometric Study of Ap and Am Stars in the Infrared (10)

On the whole, no relations can be found between the infrared colors and the spectral types either for Am stars or for Ap stars in the 2MASS and WISE region.

7.Summary

In this paper, 426 well known confirmed Ap and Am stars are photometrically studied in the infrared. The 2MASS, WISE,and IRAS data are employed to make analyses. Our result in this paper shows that in the W1 (3.4 μm)–W2 (4.6 μm) color, over half of Ap and Am stars indeed have infrared excesses. The conclusion of the infrared excess in the M band (4.8 μm) for many CP stars by Groote & Kaufmann (1981, 1983, 1984) is confirmed by this result. The important result we found is that infrared excesses in the W1–W2 color for these stars are mainly due to the influences of the binarity, the multiplicity, and/or the debris disk. However, statistically, either majority of Ap stars or majority of Am stars have no infrared excesses in the remaining infrared colors including the J–K, W2–W3, W3–W4 colors, and IRAS bands. In addition, it is seen that the probability of being the binarity, the multiplicity and/or the debris disk for Am stars is much higher than that for Ap stars. It is also seen that generally, no relations can be found between infrared colors and spectral types either for Ap stars or for Am stars in the 1–60 μm region.

We are grateful to the anonymous refereehelpful comments. This work is supported by grants from the National Nature Science Foundation of China (Nos. 11373067 and 11303086). This work has madeuse of data products from the 2MASS All Sky Survey, the WISE All Sky Survey, and the CDS VizieR database.