IPMU Colloquium

Speaker: Hyunbae Park (Kavli IPMU)
Title: Lyα Transmission in the Reionizing Intergalactic Medium (Postdoc Colloquium)
Date (JST): Fri, Sep 17, 2021, 11:00 - 11:30
Place: Zoom
Related File: 2685.pdf
Abstract: We expect neutral hydrogen gas in the intergalactic space to have scattered a significant portion of Lyα emission from star-forming galaxies during the reionization era. Thus, the Lyα line strength of high-z galaxies is considered a promising probe of reionization history. In order to quantitatively understand which properties of the intergalactic medium (IGM) determine the transmission of the Lyα photons, we calculate the IGM transmissivity from the Cosmic Dawn II (CoDa II) simulation data and analyze the results. We find that the gravitational infall motion around the source galaxy, size of the HII region, and self-shielded neutral gas systems are the crucial factors of the transmissivity. In this talk, I will elaborate on how each of those factors affects the observability of high redshift Lyα emitters.
Contact: https://ipmu.zoom.us/webinar/register/WN_VTTp-bOdQY6GHCMDQrFVIg
Remarks: IPMU Postdoc Colloquium Series
Registration necessary from here: https://ipmu.zoom.us/webinar/register/WN_VTTp-bOdQY6GHCMDQrFVIg