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POLAR - I: linking the 21-cm signal from the epoch of reionization to galaxy formation

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posted on 2024-06-11, 15:38 authored by Qing-Bo Ma, Raghunath Ghara, Benedetta Ciardi, Ilian IlievIlian Iliev, Léon V E Koopmans, Garrelt Mellema, Rajesh Mondal, Saleem Zaroubi
To self-consistently model galactic properties, reionization of the intergalactic medium, and the associated 21-cm signal, we have developed the algorithm POLAR by integrating the one-dimensional radiative transfer code GRIZZLY with the semi-analytical galaxy formation code L-GALAXIES 2020. Our proof-of-concept results are consistent with observations of the star formation rate history, UV luminosity function, and the CMB Thomson scattering optical depth. We then investigate how different galaxy formation models affect UV luminosity functions and 21-cm power spectra, and find that while the former are most sensitive to the parameters describing the merger of haloes, the latter have a stronger dependence on the supernovae feedback parameters, and both are affected by the escape fraction model.

History

Publication status

  • Published

File Version

  • Published version

Journal

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

Publisher

Oxford University Press (OUP)

Issue

3

Volume

522

Page range

3284-3297

Department affiliated with

  • Physics and Astronomy Publications

Institution

University of Sussex

Full text available

  • Yes

Peer reviewed?

  • Yes