The OBELISK simulation: Galaxies contribute more than AGN to H I reionization of protoclusters
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
The OBELISK simulation : Galaxies contribute more than AGN to H I reionization of protoclusters. / Trebitsch, Maxime; Dubois, Yohan; Volonteri, Marta; Pfister, Hugo; Cadiou, Corentin; Katz, Harley; Rosdahl, Joakim; Kimm, Taysun; Pichon, Christophe; Beckmann, Ricarda S.; Devriendt, Julien; Slyz, Adrianne.
I: Astronomy & Astrophysics, Bind 653, A154, 28.09.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - The OBELISK simulation
T2 - Galaxies contribute more than AGN to H I reionization of protoclusters
AU - Trebitsch, Maxime
AU - Dubois, Yohan
AU - Volonteri, Marta
AU - Pfister, Hugo
AU - Cadiou, Corentin
AU - Katz, Harley
AU - Rosdahl, Joakim
AU - Kimm, Taysun
AU - Pichon, Christophe
AU - Beckmann, Ricarda S.
AU - Devriendt, Julien
AU - Slyz, Adrianne
PY - 2021/9/28
Y1 - 2021/9/28
N2 - 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 z = 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 z similar to 6 in our overdensity, and is predominantly driven by galaxies, while accreting black holes only play a role at z similar to 4.
AB - 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 z = 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 z similar to 6 in our overdensity, and is predominantly driven by galaxies, while accreting black holes only play a role at z similar to 4.
KW - methods: numerical
KW - galaxies: formation
KW - galaxies: high-redshift
KW - intergalactic medium
KW - quasars: supermassive black holes
KW - dark ages, reionization, first stars
KW - ACTIVE GALACTIC NUCLEI
KW - SUPERMASSIVE BLACK-HOLES
KW - HIGH-REDSHIFT GALAXIES
KW - STAR-FORMING GALAXIES
KW - RADIATION-HYDRODYNAMICS SIMULATION
KW - QUASAR LUMINOSITY FUNCTION
KW - CONTINUUM ESCAPE FRACTION
KW - ADAPTIVE MESH REFINEMENT
KW - STELLAR MASS FUNCTIONS
KW - 1ST BILLION YEARS
U2 - 10.1051/0004-6361/202037698
DO - 10.1051/0004-6361/202037698
M3 - Journal article
VL - 653
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A154
ER -
ID: 281221369