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

Strawn, Clayton ; Roca-Fàbrega, Santi LU orcid ; Primack, Joel R. ; Kim, Ji Hoon ; Genina, Anna ; Hausammann, Loic ; Kim, Hyeonyong ; Lupi, Alessandro ; Nagamine, Kentaro and Powell, Johnny W. , et al. (2024) In Astrophysical Journal 962(1).
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... (More)

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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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Astrophysical Journal
volume
962
issue
1
article number
29
publisher
American Astronomical Society
external identifiers
  • scopus:85183944928
ISSN
0004-637X
DOI
10.3847/1538-4357/ad12cb
language
English
LU publication?
yes
id
922ca23b-6946-4dd8-b04c-2dfa45d425c7
date added to LUP
2024-02-28 15:40:22
date last changed
2024-02-28 15:41:55
@article{922ca23b-6946-4dd8-b04c-2dfa45d425c7,
  abstract     = {{<p>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.</p>}},
  author       = {{Strawn, Clayton and Roca-Fàbrega, Santi and Primack, Joel R. and Kim, Ji Hoon and Genina, Anna and Hausammann, Loic and Kim, Hyeonyong and Lupi, Alessandro and Nagamine, Kentaro and Powell, Johnny W. and Revaz, Yves and Shimizu, Ikkoh and Velázquez, Héctor and Abel, Tom and Ceverino, Daniel and Dong, Bili and Jung, Minyong and Quinn, Thomas R. and Shin, Eun Jin and Barrow, Kirk S.S. and Dekel, Avishai and Oh, Boon Kiat and Mandelker, Nir and Teyssier, Romain and Hummels, Cameron and Maji, Soumily and Man, Antonio and Mayerhofer, Paul}},
  issn         = {{0004-637X}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{American Astronomical Society}},
  series       = {{Astrophysical Journal}},
  title        = {{The AGORA High-resolution Galaxy Simulations Comparison Project. VI. Similarities and Differences in the Circumgalactic Medium}},
  url          = {{http://dx.doi.org/10.3847/1538-4357/ad12cb}},
  doi          = {{10.3847/1538-4357/ad12cb}},
  volume       = {{962}},
  year         = {{2024}},
}