A primer on hierarchical galaxy formation: the semi-analytical approach

Abstract

Recent observational and theoretical breakthroughs make this an exciting time to be working towards understanding the physics of galaxy formation. The goal of this review is to make the principles behind the hierarchical paradigm accessible to a wide audience by providing a pedagogical introduction to modern theories of galaxy formation. I outline the ingredients of the powerful approach called semi-analytical modelling and contrast this method with numerical simulations of the gas dynamics of baryons. Semi-analytical models have enjoyed many successes, but it is the observations which the models struggle to match which mark out areas where future progress is most likely to be made; these are also reviewed.

68 pages. Review article for Reports on Progress in Physics. A version with high resolution figures can be downloaded from http://star-www.dur.ac.uk/~cmb/rop_review.ps

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