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The OBELISK simulation: galaxies contribute more than AGN to H I reionization of protoclusters

We present the OBELISK project, a cosmological radiation-hydrodynamics simulation that follows the assembly and reionization of a protocluster progenitor during the first two billion years after the big bang, down to <i>z<i/> = 3.5. The simulation resolves haloes down to the atomic cooli...

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Hauptverfasser: Trebitsch, Maxime (VerfasserIn) , Dubois, Yohan (VerfasserIn) , Volonteri, Marta (VerfasserIn) , Pfister, Hugo (VerfasserIn) , Cadiou, Corentin (VerfasserIn) , Katz, Harley (VerfasserIn) , Rosdahl, Joakim (VerfasserIn) , Kimm, Taysun (VerfasserIn) , Pichon, Christophe (VerfasserIn) , Beckmann, Ricarda S. (VerfasserIn) , Devriendt, Julien (VerfasserIn) , Slyz, Adrianne (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: September 28, 2021
In: Astronomy and astrophysics
Year: 2021, Jahrgang: 653, Pages: 1-16
ISSN:1432-0746
DOI:10.1051/0004-6361/202037698
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/202037698
Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2021/09/aa37698-20/aa37698-20.html
Volltext
Verfasserangaben:Maxime Trebitsch, Yohan Dubois, Marta Volonteri, Hugo Pfister, Corentin Cadiou, Harley Katz, Joakim Rosdahl, Taysun Kimm, Christophe Pichon, Ricarda S. Beckmann, Julien Devriendt, and Adrianne Slyz
Beschreibung
Zusammenfassung:We present the OBELISK project, a cosmological radiation-hydrodynamics simulation that follows the assembly and reionization of a protocluster progenitor during the first two billion years after the big bang, down to <i>z<i/> = 3.5. The simulation resolves haloes down to the atomic cooling limit and tracks the contribution of different sources of ionization: stars, active galactic nuclei, and collisions. The OBELISK project is specifically designed to study the coevolution of high-redshift galaxies and quasars in an environment favouring black hole growth. In this paper, we establish the relative contribution of these two sources of radiation to reionization and their respective role in establishing and maintaining the high-redshift ionizing background. Our volume is typical of an overdense region of the Universe and displays star formation rate and black hole accretion rate densities similar to those of high-redshift protoclusters. We find that hydrogen reionization happens inside-out, is completed by <i>z<i/> ∼ 6 in our overdensity, and is predominantly driven by galaxies, while accreting black holes only play a role at <i>z<i/> ∼ 4.
Beschreibung:Published: SEP 28 2021
Gesehen am 24.03.2022
Beschreibung:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/202037698

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