Special Seminar

Speaker: Shun Saito (Missouri Science & Technology U.)
Title: An empirical but physically motivated synthetic catalog of Lyman-Alpha Emitters
Date (JST): Tue, Jul 02, 2024, 11:00 - 12:00
Place: Seminar Room A
Abstract: Lyman-Alpha Emitters (LAEs) are promising probes to study cosmology and galaxy evolution at high redshifts. A demand to construct a realistic simulation of LAEs is higher than ever, given the ongoing and forthcoming galaxy redshift surveys such as Hobby-Eberly Telescope Dark Energy Experiment (HETDEX), Dark Energy Spectroscopic Instrument II (DESI-II), and Spec-S5. However, simulating LAEs is not a trivial task, because it involves physics at the scales from interstellar medium (ISM, O(pc)) to intergalactic medium (IGM, O(1-10Mpc)) and cosmological scales (O(1Gpc)). In particular, the resonant nature of the Lyman-alpha emission makes the problem harder due to its radiative transfer. In this talk, we introduce our empirical but physically motivated method to construct a LAE population on top of a dark-matter only N-body simulation where relevant physics at ISM and IGM scales are supposed to be effectively captured. We will show that we can calibrate our model in a way that it reproduces the LAE luminosity function and clustering at the same time at z=2-3, which was not achieved by any other previous work.