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

Strawn, Clayton; Roca-Fàbrega, Santi; Primack, Joel R.; Kim, Ji-hoon; Genina, Anna; Hausammann, Loic; Kim, Hyeonyong; Lupi, Alessandro; Nagamine, Kentaro; Powell, Johnny W.; Revaz, Yves; Shimizu, Ikkoh; Velázquez, Héctor; Abel, Tom; Ceverino, Daniel; Dong, Bili; Jung, Minyong; Quinn, Thomas R.; Shin, Eun-jin; Barrow, Kirk S. S.; Dekel, Avishai; Oh, Boon Kiat; Mandelker, Nir; Teyssier, Romain; Hummels, Cameron; Maji, Soumily; Man, Antonio; Mayerhofer, Paul

doi:10.3847/1538-4357/ad12cb

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

Journal Article · Fri Feb 02 00:00:00 EST 2024 · The Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/ad12cb· OSTI ID:2283806

;

; Genina, Anna;

;

; Revaz, Yves; Shimizu, Ikkoh; Velázquez, Héctor;

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; Dong, Bili;

;

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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF)

Contributing Organization:: AGORA Collaboration

Grant/Contract Number:: AC0205CH11231; AC02-76SF00515; NAS5-26555; HST-AR-14578; HST-AR-15800; HST-AR-16633; HST-GO-16703

OSTI ID:: 2283806

Alternate ID(s):: OSTI ID: 2322468

Journal Information:: The Astrophysical Journal, Journal Name: The Astrophysical Journal Vol. 962 Journal Issue: 1; ISSN 0004-637X

Publisher:: American Astronomical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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