A search for young stars in the halo of M31

Details A search for young stars in the halo of M31 A search for young stars in the halo of M31

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...411..650m&link_type=abstract

Astrophysical Journal - Part 1 (ISSN 0004-637X), vol. 411, no. 2, p. 650-654.

Astronomy and Astrophysics

Astrophysics

2

Andromeda Galaxy, B Stars, Early Stars, Galactic Halos, Hot Stars, Open Clusters, Astronomical Spectroscopy, Charge Coupled Devices, Milky Way Galaxy, Radial Velocity, Searching

Scientific paper

Previous studies have identified young hot stars that appear to have been formed in the halo of our Galaxy. Here we present preliminary results of a spectroscopic search for similar objects in the halo of M31. Radial velocities have been measured for 23 apparently blue objects in a B(v) magnitude range of about 17-21. For one of these targets, AND 0029+413, the radial velocity suggests that the object is gravitationally bound to M31 and hence that it may be in its halo. However, recent CCD photometry for this object indicates that it is redder than implied by the original photographic observations. A number of possible scenarios are presented to explain this object, including one consistent with it being a young star in the halo of M31.

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