Kinematics of a sample of globular clusters in the halo and the mass of M 31

Details Kinematics of a sample of globular clusters in the halo and the mass of M 31 Kinematics of a sample of globular clusters in the halo and the mass of M 31

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...236...99f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 1, Sept. 1990, p. 99-106. Research supported by CNR and Ministero del

Mathematics

Logic

18

Andromeda Galaxy, Galactic Mass, Globular Clusters, Halos, Mass Distribution, Radial Velocity

Scientific paper

Observations of a sample of globular clusters in the halo of M 31, obtained with the 4-m telescope at KPNO during October 1983, are reported and analyzed. The data are combined with published results in tables and graphs and used, applying projected mass estimators to concentric shells, to determine the total mass of the galaxy as 3.2 x 10 to the 11th solar masses out to a galactocentric radius of 16 kpc and 12 x 10 to the 11th solar masses out to 26 kpc. Application of the model of Richstone and Tremaine (1984) yields an effective radius of 22 kpc and a mass of 7 x 10 to the 11th solar masses. All of these findings are shown to be consistent with a massive extended low-luminosity halo.

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