The Lyman-alpha Cosmic Web

Abstract

While Lyman-alpha emitters (LAEs) are already a popular astrophysical and cosmological tracer of the high-z (>2) universe, diffuse Lyman-alpha observations outside of galaxies could become a powerful probe of the filamentary structure of the cosmic web in the future. However, the interpretation of such observations is complicated due to the radiative transfer (RT) arising from the resonant nature of the Lyman-alpha line.