The properties of Ly-alpha emitting galaxies in hierarchical galaxy formation models

摘要: We present detailed predictions for the properties of Ly-alpha-emitting galaxies in framework Lambda-CDM cosmology, calculated using semi-analytical galaxy formation model GALFORM. explore a which assumes top-heavy IMF starbursts, and has previously been shown to explain sub-mm number counts luminosity function Lyman-break at high redshift. show that this model, with simple assumption fixed fraction Ly-alpha photons escape from each galaxy, is remarkably successful explaining observed emitters over redshift range 3 7, starting be probed by near-IR surveys new instruments such as DAzLE.