Some Current Issues in Galaxy Formation

Abstract

I describe recent challenges in hierarchical galaxy formation theory, including the formation of disk galaxies and of ellipticals. Problems with cold dark matter are summarized, and possible solutions are presented. I conclude with a description of the prospects for observing one of the most important ingredients in galaxy formation theory, namely cold dark matter.

To appear in the proceedings of Where Cosmology and Fundamental Physics Meet, 23-26 June, 2003, Marseille, France