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The signature of galaxy formation models in the power spectrum of the hydrogen 21 cm line during reionization

Observations of the 21 cm line of hydrogen are poised to revolutionize our knowledge of reionization and the first galaxies. However, harnessing such information requires robust and comprehensive theoretical modelling. We study the non-linear effects of hydrodynamics and astrophysical feedback proce...

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Bibliographic Details
Main Authors: Lewis, Joseph (Author) , Pillepich, Annalisa (Author) , Nelson, Dylan (Author) , Klessen, Ralf S. (Author) , Glover, Simon (Author)
Format: Article (Journal)
Language:English
Published: February 2024
In: Monthly notices of the Royal Astronomical Society
Year: 2024, Volume: 528, Issue: 2, Pages: 3592-3612
ISSN:1365-2966
DOI:10.1093/mnras/stad3903
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1093/mnras/stad3903
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Author Notes:Joseph S.W. Lewis, Annalisa Pillepich, Dylan Nelson, Ralf S. Klessen and Simon C.O. Glover
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Summary:Observations of the 21 cm line of hydrogen are poised to revolutionize our knowledge of reionization and the first galaxies. However, harnessing such information requires robust and comprehensive theoretical modelling. We study the non-linear effects of hydrodynamics and astrophysical feedback processes, including stellar and AGN feedback, on the 21 cm signal by post-processing three existing cosmological hydrodynamical simulations of galaxy formation: Illustris, IllustrisTNG, and Eagle. Despite their different underlying galaxy-formation models, the simulations return similar predictions for the global 21 cm brightness temperature and its power spectrum. At fixed redshift, most differences are attributable to alternative reionization histories, in turn driven by differences in the buildup of stellar sources of radiation. However, several astrophysical processes imprint signatures in the 21 cm power spectrum at two key scales. First, we find significant small-scale
Item Description:Veröffentlicht: 19. Dezember 2023
Gesehen am 12.07.2024
Physical Description:Online Resource
ISSN:1365-2966
DOI:10.1093/mnras/stad3903

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