Special Seminar

Speaker: Shun Saito (Missouri University of Science and Technology )
Title: Understanding and mitigating the cosmological impact of radiative transfer on the clustering of Lyman-alpha emitters
Date: Fri, Jan 17, 2020, 14:00 - 15:00
Place: Balcony A
Related File: 2487.pdf
Abstract: The Lyman-alpha (LyA) emission line is the most prominent feature from a young star-forming galaxy, and hence Lyman-alpha emitters (LAEs) are excellent probe of the large-scale structure at high redshift. In fact, LAEs are targeted by ongoing and forthcoming galaxy surveys such as Hobby-Eberly Telescope Dark Experiment (HETDEX) and SPHEREx.
However, one important theoretical challenge is to understand the distribution of LyA photons as they are affected by the complex nature of the radiative transfer (RT). Since the LyA emission is a resonant line with a large cross section, even small column densities of neutral hydrogen can scatter LyA photons near the line center numerous times.
In this talk, we discuss the impact of LyA RT on the clustering of LAEs on large scales on the basis of our recent RT simulations. In addition, we discuss a possibility to mitigate such impact by utilizing LyA spectral information.