Simba-C: the evolution of the thermal and chemical properties in the intragroup medium

Hough, RT and Shao, Z and Cui, W and Loubser, SI and Babul, A and Davé, R and Rennehan, D and Kobayashi, C (2024) Simba-C: the evolution of the thermal and chemical properties in the intragroup medium. In: Monthly Notices of the Royal Astronomical Society, 532 (1). pp. 476-495.

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Abstract

The newly updated GIZMO and Simba based simulation, Simba-C, with its new stellar feedback, chemical enrichment, and recalibrated AGN feedback, allows for a detailed study of the intragroup medium X-ray properties. We discuss the impact of various physical mechanisms, e.g. stellar and AGN feedback, and chemical enrichment, on the composition and the global scaling relations of nearby galaxy groups. We also study the evolution (z = 2 to 0) of the global properties for the 1 keV temperature groups. Simba-C shows improved consistent matching with the observations of all X-ray scaling relations compared to Simba. It is well known that AGN feedback has a significant influence on LX 0.5�2.0�Tspec corr, S500/2500�Tspec corr, and gas mass fractions, with our Simba-C results consistent with it. Our recalibrated AGN feedback strength also showed an additional improvement in gas entropy, which now aligns with CLoGS observations. The updated stellar feedback and chemical enrichment model is shown to play an important role in our understanding of the chemical abundance ratios and their evolution within galaxy groups. In particular, we find that Simba-C produces an increase in the amount of heavier elements (specifically Si and Fe) relative to O, compared to Simba. © The Author(s) 2024.

Item Type:	Journal Article
Publication:	Monthly Notices of the Royal Astronomical Society
Publisher:	Oxford University Press
Additional Information:	The copyright for this article belongs to authors.
Keywords:	Stars, Galaxies abundances; Galaxy evolution; Galaxy formations; Galaxy group; Galaxy:halo; Galaxy:stellar content; Intra-group; Scaling relations; Stellars; X-rays: Galaxies, Galaxies
Department/Centre:	Division of Physical & Mathematical Sciences > Mathematics Division of Physical & Mathematical Sciences > Physics
Date Deposited:	18 Dec 2024 06:31
Last Modified:	18 Dec 2024 06:31
URI:	http://eprints.iisc.ac.in/id/eprint/85847

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