Zheng Zheng (Yale), Renyue Cen (Princeton), Hy Trac (CfA), and Jordi
Miralda-Escude (ICREA/UB)

We combine a cosmological reionization simulation with box size of
100Mpc/h on a side and a Monte Carlo Lyman-alpha radiative transfer
code to model Lyman Alpha Emitters (LAEs) at z~5.7. The model
essentially adopts a constant halo mass to (UV or intrinsic Lya) light
ratio and introduces Lya radiative transfer as the single factor for
transforming the intrinsic Lya emission properties into the observed
ones. The spatial and frequency diffusions of Lya photons prove to be
crucial in determining the observed properties of high-z
LAEs. Radiative transfer depends on the environment of intergalactic
medium surrounding LAEs and on the viewing angle, which leads to a
broad distribution of apparent (observed) Lya luminosity for a given
intrinsic Lya luminosity. This environment and viewing angle dependent
appearance of LAEs introduced by Lya radiative transfer is able to
explain an array of observed properties of LAEs, including their
morphology, Lya spectra, Lya luminosity function, UV luminosity
function, and distribution of Lya equivalent width. The model also
predicts new features in the clustering of LAEs. I will discuss
implications of the results for our understanding of LAEs and for
studying reionization and cosmology with LAEs.