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The diverse density profiles of galaxy clusters with self-interacting dark matter plus baryons

Robertson, A, Massey, R, Eke, V, Tulin, S, Yu, H-B, Bahé, Y, Barnes, DJ, Bower, RG, Crain, RA, Vecchia, CD, Kay, ST, Schaller, M and Schaye, J (2018) The diverse density profiles of galaxy clusters with self-interacting dark matter plus baryons. Monthly Notices of the Royal Astronomical Society Letters, 476 (1). L20-L24. ISSN 1745-3933

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Abstract

We present the first simulated galaxy clusters (M_200 > 10^14 Msun) with both self-interacting dark matter (SIDM) and baryonic physics. They exhibit a greater diversity in both dark matter and stellar density profiles than their counterparts in simulations with collisionless dark matter (CDM), which is generated by the complex interplay between dark matter self-interactions and baryonic physics. Despite variations in formation history, we demonstrate that analytical Jeans modelling predicts the SIDM density profiles remarkably well, and the diverse properties of the haloes can be understood in terms of their different final baryon distributions.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Letters ©: 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: astro-ph.CO; astro-ph.CO
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 09 Mar 2018 10:13
Last Modified: 14 May 2021 08:45
DOI or Identification number: 10.1093/mnrasl/sly024
URI: https://researchonline.ljmu.ac.uk/id/eprint/8171

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