Dynamical masses for Galactic globular clusters

Details Dynamical masses for Galactic globular clusters Dynamical masses for Galactic globular clusters

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...252...94m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 1, Dec. 1991, p. 94-99.

Statistics

Computation

127

Galactic Mass, Globular Clusters, Astrometry, Astronomical Models, Computational Astrophysics, Dynamic Models

Scientific paper

Dynamical masses have been determined for 147 Galactic globular clusters are found to be between 260 and 2.4 x 10 exp 6 solar masses, with a mean of 1.9 x 10 exp 5 solar masses. The mass-to-light ratios of the sample of 32 cluster range from 0.66 to 2.9, with a mean of 1.21. It is shown that some clusters of low and intermediate mass lie outside the survival zone in the (log M - log rb) diagram. This is considered to be evidence for rapid mass loss through stellar evaporation. It is also found that the M/L(v) ratio is most likely dependent on the cluster mass, with the most massive clusters having the largest M/L(v) ratios. A comparison between the masses obtained with single-component and multicomponent King models show that the mass-luminosity relations for both types of models are parallel within uncertainties, and that the multicomponent masses are about twice as large as the single-component ones.

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