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Early structure formation in the THESAN radiation-magneto-hydrodynamics simulations

Published online by Cambridge University Press:  20 January 2023

E. Garaldi Open the ORCID record for E. Garaldi [Opens in a new window] ,
R. Kannan ,
A. Smith ,
V. Springel ,
R. Pakmor ,
M. Vogelsberger  and
L. Hernquist
E. Garaldi
Affiliation:
Max-Planck Institute for Astrophysics, Karl-Schwarzschild-Str. 1, D-85741 Garching, Germany
R. Kannan
Affiliation:
Center for Astrophysics Harvard Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
A. Smith
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
V. Springel
Affiliation:
Max-Planck Institute for Astrophysics, Karl-Schwarzschild-Str. 1, D-85741 Garching, Germany
R. Pakmor
Affiliation:
Max-Planck Institute for Astrophysics, Karl-Schwarzschild-Str. 1, D-85741 Garching, Germany
M. Vogelsberger
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
L. Hernquist
Affiliation:
Center for Astrophysics Harvard Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
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Abstract

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The formation of the first galaxies in the Universe is the new frontier of both galaxy formation and reionization studies. This creates a fierce new challenge, i.e. to simultaneously understand in a unique and coherent picture the processes of galaxy formation and reionization, and – crucially – their connection. To this end, we present the thesan suite of cosmological radiation-magneto-hydrodynamical simulations. They are unique since they: (i) cover a very broad range of spatial and temporal scales; (ii) include an unprecedentedly-broad range of physical processes for simulations of such scales and resolution; (iii) exploit knowledge accumulated at low redshift to minimize the number of free parameters in the physical model; (iv) use a variance-suppression technique in the production of initial conditions to increase their statistical fidelity. Finally, the thesan suite includes multiple runs of the same initial conditions, exploring current unknowns in the physics of dark matter and ionizing sources.

Keywords

galaxies: high-redshiftcosmology: large-scale structure of universeradiative transfermethods: numerical
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S362: The Predictive Power of Computational Astrophysics as a Discovery Tool , June 2020 , pp. 1 - 7
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

Footnotes

†

NHFP Einstein Fellow.

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