Journal article

A tale of two sites - II. Inferring the properties of minihalo-hosted galaxies with upcoming 21-cm interferometers

Yuxiang Qin, Andrei Mesinger, Bradley Greig, Jaehong Park

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2021

Abstract

The first generation of galaxies is expected to form in minihaloes, accreting gas through H2 cooling, and possessing unique properties. Although unlikely to be directly detected in UV/infrared surveys, the radiation from these molecular-cooling galaxies (MCGs) could leave an imprint in the 21-cm signal from the Cosmic Dawn. Here, we quantify their detectability with upcoming radio interferometers. We generate mock 21-cm power spectra using a model for both MCGs as well as more massive, atomic-cooling galaxies, allowing both populations to have different properties and scaling relations. The galaxy parameters are chosen so as to be consistent with: (i) high-redshift UV luminosity functions; (..

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Grants

Awarded by European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (AIDA)


Awarded by Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)


Awarded by KIAS individual Grant at Korea Institute for Advanced Study


Funding Acknowledgements

The authors thank the anonymous referee for their comprehensive reviewand positive comments. Thisworkwas 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. Parts of this research were supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project #CE170100013. This work was performed on the OzSTAR national facility at Swinburne University of Technology. OzSTAR is funded by Swinburne University of Technology and the National Collaborative Research Infrastructure Strategy (NCRIS). JP was supported in part by a KIAS individual Grant (PG078701) at Korea Institute for Advanced Study.