Globular clusters in the halo of M31

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115731· OSTI ID:5913253

Racine, R ^[1]

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1. Observatoire du Mont Megantic, Montreal (Canada) Canada-France-Hawaii Telescope Corp., Kamuela, HI (USA)

The CFHT was used to obtain high-resolution CCD images of 82 cluster candidates in the halo of M31. These data, combined with radial velocities which cover an additional 27 candidates, are used to compile a catalog of 51 bona fide M31 halo globulars. The other candidates are found to be background galaxies (54) and field stars (4). The cluster sample appears to be incomplete for V greater than 18. The projected distribution of globulars follows an 1/r-squared law for r(kpc) between values of 6 and 22 and then drops faster, suggesting a cutoff at about 40 kpc. These trends are similar to those for globular clusters in the Milky Way halo. The total populaton of globulars in M31 is estimated to be larger than in the Milky Way by a factor of 1.8 + or - 0.3. 30 refs.

• OSTI ID: 5913253
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 101; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CATALOGS
COMPARATIVE EVALUATIONS
DISTRIBUTION
DOCUMENT TYPES
GALAXIES
IMAGES
MILKY WAY
PHOTOGRAPHY
POPULATIONS
RADIAL VELOCITY
SPATIAL DISTRIBUTION
STAR CLUSTERS
VELOCITY