2001A&A...366..817B

Query : 2001A&A...366..817B

2001A&A...366..817B - Astronomy and Astrophysics, volume 366, 817-826 (2001/2-2)

A search for peculiar objects in young open clusters. I. New emission line and late spectral type stars in NGC 6871.

BERNABEI S. and POLCARO V.F.

Abstract (from CDS):

We present the first results of a search in young open clusters for stars of very high initial mass, carried out by means of slitless spectroscopy. A deep (R≃17) survey of the open cluster NGC 6871 reveals many new objects of late spectral type, including an S star, as well as three new emission line stars, which are classified as Be stars. The already known Be star HD 227733 is surrounded by a previously undetected reflection nebula. The star VES 145, classified as an emission line object, is actually a late-type star, without any emission feature. We argue that VES 145 is a young RSG of a very high mass (M₀≃25M_☉) and a cluster member.

Abstract Copyright: ∼

Journal keyword(s): stars: early types - stars: emission-line, Be - stars: evolution - stars: individual (HD 227733, VES 145) - stars: late-type

Nomenclature: Tables 2, 3: Cl* NGC 6871 BP N (Nos 1-9).

Simbad objects: 15

Full paper

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Number of rows : 15

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	Cl* NGC 6871 BP 3	*	20 04 44.9858643816	+35 44 42.852277248		12.66	12.75			B8Ve	8	0
2	Cl* NGC 6871 BP 4	*	20 04 50.0621552520	+35 54 33.243773832			14.0			M3.5III	1	0
3	Cl* NGC 6871 BP 2	*	20 04 54.0303292800	+35 51 21.540468888		11.85	11.98			B5Ve	4	0
4	Cl* NGC 6871 BP 6	*	20 05 31.5909272345	+35 53 55.778144793			12.9			~	2	0
5	Cl* NGC 6871 BP 8	*	20 05 34.8338637000	+35 36 07.196451624		14.41	14.15			~	3	0
6	HD 227611	Be*	20 05 45.1471495080	+35 54 02.992953780	8.30	9.06	8.80			B1:III/Ve	71	0
7	HD 190918	WR*	20 05 57.3244526328	+35 47 18.150756792	6.11	6.88	6.75			WN5+O9I	363	0
8	NGC 6871	OpC	20 06 12	+35 45.9		5.43	5.2			~	216	0
9	Cl* NGC 6871 BP 9	*	20 06 12.7236797760	+35 47 25.584341244						M:	1	0
10	Cl* NGC 6871 BP 1	*	20 06 47.4727113120	+35 41 47.240263896			16.0			B:e	1	1
11	Cl* NGC 6871 BP 7	*	20 06 49.6323460056	+35 52 23.965695120		14.55	12.34			M:	2	0
12	MSX6C G072.6158+01.8150	s*r	20 06 53.9896531296	+35 37 26.724552312			11.765	11.110		M0I	4	0
13	HD 227733	Em*	20 07 00.9389267952	+35 40 06.286359180	10.11	10.59	10.38			B	17	0
14	IRAS 20051+3531	S*	20 07 04.0553865744	+35 40 11.134390152			16.0			S	7	0
15	BD+28 4211	HS*	21 51 11.0221915656	+28 51 50.367627468	8.922	10.25	10.58	10.656	10.831	sdO2VIIIHe5	778	0

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