Globular clusters in the halo of M31

Details Globular clusters in the halo of M31 Globular clusters in the halo of M31

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101..865r&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 101, March 1991, p. 865-872, 1101. Research supported by NSERC and Ministere de l'Ed

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77

Andromeda Galaxy, Globular Clusters, Halos, Astronomical Catalogs, Astronomical Photography, Radial Velocity

Scientific paper

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.

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