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

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

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...366..817b&link_type=abstract

Astronomy and Astrophysics, v.366, p.817-826 (2001)

Astronomy and Astrophysics

Astrophysics

6

Stars: Early Types, Stars: Emission-Line, Be, Stars: Evolution, Stars: Individual (Hd 227733, Ves 145), Stars: Late-Type

Scientific paper

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 (M_0 =~ 25 Msun) and a cluster member. Based on data collected at 1.52 m ``Cassini" Telescope of the Loiano Observing Station, Bologna Astronomical Observatory. Based on data collected at 1.52 m ``Cassini" Telescope of the Loiano Observing Station, Bologna Astronomical Observatory. Based on data collected at 1.52 m ``Cassini" Telescope of the Loiano Observing Station, Bologna Astronomical Observatory.

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