Studies of globular clusters. I. Star counts in 23 clusters

Abstract

Star counts have been used to obtain surface density profiles in 23 globular clusters; the data are presented in tabular and graphical form. Core and tidal radii have been determined by fitting to theoretical models. The density, relaxation time, velocity dispersion, and escape velocity at the center of each cluster have been computed wherever possible. These observed and derived data supplement the tabulations of Peterson and King (1975).