Horizontal branch in globular clusters of the galaxy and the magellanic clouds in sculptor-type dwarf galaxies

Abstract

Despite the sparsity of data on globular clusters in the Magellanic Clouds and Sculptor-type dwarf galaxies, a preliminary comparison of them with globular clusters of the Galaxy can be made. 1) If observational selection does not seriously distort the results, there is a higher fraction of young globular clusters among those in the Magellanic Clouds that have a horizontal branch than among the globular clusters of the Galaxy. In addition, the clusters in Lhe Large Cloud are older than those in the Small Cloud. 2) To the know similarities between globular clusters and Sculptor-type dwarf elliptic galaxies one can add the following characteristics of the latter: a) the α distribution, b) the values of r, and c) position on the α-r diagram. If these parametess reflect the history of development of the corresponding systems, this similarity suggests that the observed stage of stellar evolution is similar in Sculpto r-type globular clusters.