A search for young stars in the halo of M31

R. J.H. Mccausland*, E. S. Conlon, P. L. Dufton, A. Fitzsimmons, M. J. Irwin, F. P. Keenan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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 (selected from APM measurements of Schmidt plates) in a magnitude range Bv ≃ 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.

Original languageEnglish
Pages (from-to)650-654
Number of pages5
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 10 Jul 1993


  • Galaxies: individual (M31)
  • Galaxies: stellar content
  • Stars: early-type

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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