Axion Cosmology

Abstract

Outline: 1. Thermal axions 2. Axion field evolution 3. The domain wall problem 4. Cold axions 5. Axion miniclusters 6. Axion isocurvature perturbations

Comments: 31 pages, prepared for the Lecture Notes on Physics (Springer Verlag) volume on Axions, edited by M. Kuster. A couple references added and a few minor changes in wording