Massive star clusters in galaxies.
The ensemble of all star clusters in a galaxy constitutes its star cluster system. In this review, the focus of the discussion is on the ability of star clusters, particularly the systems of old massive globular clusters (GCs), to mark the early evolutionary history of galaxies. I review current themes and key findings in GC research, and highlight some of the outstanding questions that are emerging from recent work.
Harris
William E
WE
Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada. harris@physics.mcmaster.ca