Abstract

We are in the golden age for the search for high-redshift galaxies, made possible by state of the art instruments including the Hubble, Subaru and Keck Telescopes. Two such classes of galaxies, namely Lyman Alpha Emitters (LAEs) and Lyman Break Galaxies (LBGs) have rapidly been gaining popularity as theoretical probes of the epoch of reionization, galaxy evolution and the dust enrichment of galaxies in the first billion years. In this talk, I will present a broad overview of the semi-analytic and numerical galaxy formation models proposed to explain the observed data sets. I will also discuss the results from these models regarding reionization, the physical nature of these galaxies and the LAE -LBG connection. Finally, I will also show how these galaxies can be used to study the evolution of the Fundamental Metallicity Relation linking the stellar mass, star formation rate and gas metallicity, from z=0 to these high-redshifts.