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The AGORA High-resolution Galaxy Simulations Comparison Project. VI. Similarities and Differences in the Circumgalactic Medium

Authors :
Clayton Strawn
Santi Roca-Fàbrega
Joel R. Primack
Ji-hoon Kim
Anna Genina
Loic Hausammann
Hyeonyong Kim
Alessandro Lupi
Kentaro Nagamine
Johnny W. Powell
Yves Revaz
Ikkoh Shimizu
Héctor Velázquez
Tom Abel
Daniel Ceverino
Bili Dong
Minyong Jung
Thomas R. Quinn
Eun-jin Shin
Kirk S. S. Barrow
Avishai Dekel
Boon Kiat Oh
Nir Mandelker
Romain Teyssier
Cameron Hummels
Soumily Maji
Antonio Man
Paul Mayerhofer
the AGORA Collaboration
Source :
The Astrophysical Journal, Vol 962, Iss 1, p 29 (2024)
Publication Year :
2024
Publisher :
IOP Publishing, 2024.

Abstract

We analyze the circumgalactic medium (CGM) for eight commonly-used cosmological codes in the AGORA collaboration. The codes are calibrated to use identical initial conditions, cosmology, heating and cooling, and star formation thresholds, but each evolves with its own unique code architecture and stellar feedback implementation. Here, we analyze the results of these simulations in terms of the structure, composition, and phase dynamics of the CGM. We show properties such as metal distribution, ionization levels, and kinematics are effective tracers of the effects of the different code feedback and implementation methods, and as such they can be highly divergent between simulations. This is merely a fiducial set of models, against which we will in the future compare multiple feedback recipes for each code. Nevertheless, we find that the large parameter space these simulations establish can help disentangle the different variables that affect observable quantities in the CGM, e.g., showing that abundances for ions with higher ionization energy are more strongly determined by the simulation’s metallicity, while abundances for ions with lower ionization energy are more strongly determined by the gas density and temperature.

Details

Language :
English
ISSN :
15384357
Volume :
962
Issue :
1
Database :
Directory of Open Access Journals
Journal :
The Astrophysical Journal
Publication Type :
Academic Journal
Accession number :
edsdoj.474a5d4aba8e44bbb3466e8571991fcd
Document Type :
article
Full Text :
https://doi.org/10.3847/1538-4357/ad12cb