Journal article
Dark-ages reionization and galaxy formation simulation XX. The Ly α IGM transmission properties and environment of bright galaxies during the epoch of reionization
Y Qin, JSB Wyithe, PA Oesch, GD Illingworth, E Leonova, SJ Mutch, RP Naidu
Monthly Notices of the Royal Astronomical Society | Published : 2022
Abstract
The highly neutral intergalactic medium (IGM) during the epoch of reionization (EoR) is expected to suppress Ly α emission with damping-wing absorption, causing nearly no Ly α detection from star-forming galaxies at z ∼8. However, spectroscopic observations of the four brightest galaxies (H160 ∼25 mag) at these redshifts do reveal prominent Ly α line, suggesting locally ionized IGM. In this paper, we explore the Ly α IGM transmission and environment of bright galaxies during the EoR using the Meraxes semi-analytic model. We find brighter galaxies to be less affected by damping-wing absorption as they are effective at ionizing surrounding neutral hydrogen. Specifically, the brightest sources ..
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Grants
Awarded by Horizon 2020 Framework Programme
Funding Acknowledgements
This research was supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project #CE170100013. Parts of this work was supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (AIDA - #638809). The results presented here reflect the authors' views; the ERC is not responsible for their use. The simulations presented in this work were run on the OzSTAR national facility at Swinburne University of Technology. PAO acknowledges support from the Swiss National Science Foundation through the SNSF Professorship grant 190079. The Cosmic Dawn Center (DAWN) is funded by the Danish National Research Foundation under grant No. 140. GDI is grateful for support from program HST-GO-15103.002-A from STScI/AURA Inc under NASA contract NAS 5-26555. RPN gratefully acknowledges an Ashford Fellowship granted by Harvard University.