Lyman alpha emitters in cosmological simulations: Lyman alpha escape fraction and statistical properties

Abstract

By use large cosmological Smoothed-Particle-Hydrodynamics simulations, we explore observed properties of Lyman alpha emitters (LAEs). We develop a phenomenological model of absorption, scattering and escape of Lyman alpha (Lyα) photons motivated by Neufeld (1991). In our model, we assume that the clumpiness of the inter-stellar medium in a galaxy is correlated with the larger scale substructure richness. As a result, we reproduce, for the first time, all of the following observed properties of LAEs at z=3.1: Lyα luminosity function, UV luminosity function of LAEs, the angular correlation function and the equivalent width distribution of Lya line. In this poster, we will discuss not only the statistical properties of LAEs at the other redshift (z = 2 ∼ 6), but also the relation between LAEs and the other high-z galaxies such as Lyman break galaxies and Submm galaxies.