Multiplicity of late-type B stars with HgMn peculiarity

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Table 1

Objects studied in the program.

HD	Other	V	K^a	Spectral	Parallax
number	Identifier			Type	[mas]

1909	HR 89	6.56	6.66	B9IVmn	5.13	±	0.83
7374	HR 364	5.96	6.21	B8III	6.52	±	0.79
11753	HR 558	5.11	5.17	A3V	10.55	±	0.69
14228	HR 674	3.55		B8IV-V	21.06	±	0.61
19400	HR 939	5.50		B8III/IV	6.21	±	0.50
21933	HR 1079	5.75	5.88	B9IV	9.18	±	0.87
23950	HR 1185	6.07	5.98	B8III	10.14	±	0.90
27295	HR 1339	5.49	5.61	B9IV	12.20	±	0.76
27376	HR 1347	3.55		B9V	18.27	±	0.55
28217	HR 1402	5.87	5.64	B8IV	6.70	±	0.96
29589	HR 1484	5.45	5.66	B8IV	9.46	±	0.78
31373	HR 1576	5.79	5.97	B9V	7.71	±	0.87
32964	HR 1657	5.10	5.20	B9V+...	11.65	±	0.73
33647	HR 1690	6.67	6.86	B9Vn	2.03	±	1.04
33904	HR 1702	3.28		B9IV&...	17.69	±	0.71
34364	HR 1728	6.14	6.27	B9.5V	8.20	±	0.78
34880	HR 1759	6.41		B8III	4.80	±	1.32
35548	HR 1800	6.56	6.60	B9sp...	4.42	±	0.80
36881	HR 1883	5.63	4.96	B9IIImnp...	2.23	±	0.82
37752	HR 1951	6.58	6.71	B8p	4.64	±	0.96
38478	HR 1985	5.99	6.13	B8IIImnp...	3.71	±	0.91
42657	HR 2202	6.20	6.33	B9mnp...	5.52	±	1.09
49606	HR 2519	5.87	6.15	B7III	3.52	±	0.83
51688	HR 2605	6.39	6.64	B8III	2.72	±	0.88
53244	HR 2657	4.10	4.37	B8II	8.11	±	0.63
53929	HR 2676	6.09	6.37	B9.5III	4.60	±	0.78
59067	HR 2859	5.87	3.75	A0^b	3.23	±	1.39
63975	HR 3059	5.13	5.37	B8II	7.76	±	1.02
65949	CD-60 1951	8.37	8.37	B8/B9	3.60	±	2.72
65950	CD-60 1952	6.87	6.76	B8III	2.91	±	0.57
66259	CD-60 1998	8.33		B9.5V	2.91	±	0.57^c
66409	CD-60 2009	8.41	8.33	B8IV/V	2.91	±	0.57^c
68099	HR 3201	6.08	6.35	B6III	3.74	±	0.99
68826	AO Vel	9.42	9.11	B9III	^d
70235	HR 3273	6.43	6.59	B8Ib/II	4.00	±	0.58
71066	HR 3302	5.62	5.84	A0IVmn	8.25	±	0.48
71833	HR 3345	6.67	6.78	B8II	2.43	±	0.82
72208	HR 3361	6.83	6.83	B9p...	4.96	±	1.04
73340	HR 3413	5.78	6.04	B8p...	6.99	±	0.44
75333	HR 3500	5.31		B9mnp...	7.45	±	0.74
78316	HR 3623	5.24	5.46	B8IIImnp	6.74	±	0.91
90264	HR 4089	4.95	5.31	B8V	7.59	±	0.50
101189	HR 4487	5.14	5.13	B9IV	10.98	±	0.57
110073	HR 4817	4.63	4.79	B8II/III	9.19	±	0.85
120709^e	HR 5210	4.56		B5III	10.96	±	0.88
124740	CD-40 8541	7.86	7.83	Ap...	4.86	±	1.13
129174	HR 5475	4.91		B9p+...	10.28	±	0.91
141556	HR 5883	3.96		B9IV	15.86	±	0.84
144661	HR 5998	6.32	6.43	B8IV/V	8.50	±	0.84
144844	HR 6003	5.86	5.71	B9V	7.65	±	0.77
158704	HR 6520	6.06	6.15	B9II/III	7.47	±	1.10
165493	HR 6759	6.15		B7.5II	4.00	±	1.01
178065	HR 7245	6.56	6.35	B9III	4.34	±	0.88
216494	HR 8704	5.78	5.93	B8IV/V	4.96	±	0.84
221507	HR 8937	4.37	4.61	B9.5IVmnpe...	18.28	±	0.80
224926	HR 9087	5.12	5.44	B7III-IV	7.98	±	0.71

41040^f	HR 2130	5.14	5.36	B8III	3.05	±	0.96

Notes. (a) Please note that for some targets, SIMBAD is not listing a K magnitude. (b) SIMBAD is listing a spectral type G8Ib-II+... for HD 59067. We adopted the spectral type given by Schneider (1981). (c) HD 65949, HD 65950, HD 66259, and HD 66409 are all members of the open cluster NGC 2516. Since SIMBAD does not provide an individual parallax, we adopted the parallax of the brighter star HD 65950 for HD 66259 and HD 66409. (d) González et al. (2006) give a distance of 0.72 kpc for HD 68826 (AO Vel). (e) HD 120709 belongs to the subgroup of PGa stars, which are usually considered as the hotter extension of HgMn stars, exhibiting deficient He and strongly overabundant P and Ga (e.g. Castelli et al. 1997). (f) HD 41040 is not known to present spectral peculiarities, but the orbital parameters of the short period subsystem are in the range of those typical for HgMn stars. It is not included in the sample of 56 HgMn stars for statistical considerations.

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