Other
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98..596p&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 98, Aug. 1989, p. 596-610. Research supported by Vanderbilt University and Rutgers U
Other
53
Globular Clusters, Mass To Light Ratios, Brightness Distribution, Dynamic Models, Radial Velocity
Scientific paper
Radial velocities accurate to about 1 km/s have been obtained for about 20 stars in each of the two cusp clusters NGC 6624 and M70 and in the centrally concentrated noncusped cluster M28. NGC 6624 and M70 are equally well fit by single and multicomponent King (1966) models with concentrations of greater than 2.0, and M28 is best fit by models with a concentration near 2.0. It is found that the M/L ratios of NGC 6624, M28, and M70 do not differ significantly from each other or from those of the cluster population as a whole, and that anisotropic models are poorer fits to the surface-brightness profiles than isotropic models. M28 and M70 are found to have less than about 25 percent of their mass in the form of remnants heavier than the giants, while NGC 6624 has less than about 10 percent in this form.
Fletcher Murray J.
Hesser James Edward
McClure Robert D.
Pryor Carlton
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