Gamma-Ray Bursts versus Quasars: Lyman-alpha Signatures of Reionization versus Cosmological Infall
arXiv:astro-ph/0305470 · doi:10.1086/380435
Abstract
Lyman-alpha absorption is a prominent cosmological tool for probing both galactic halos and the intergalactic medium at high redshift. We consider a variety of sources that can be used as the Lyman-alpha emitters for this purpose. Among these sources, we argue that quasars are the best probes of the evolution of massive halos, while gamma-ray bursts represent the cleanest sources for studying the reionization of the intergalactic medium.
13 ApJ pages, 5 figures, ApJ, final minor changes