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

Robertson, Andrew; Massey, Richard; Eke, Vincent; Tulin, Sean; Yu, Hai-Bo; Bahé, Yannick; Barnes, David J; Bower, Richard G; Crain, Robert A; Dalla Vecchia, Claudio; Kay, Scott T; Schaller, Matthieu; Schaye, Joop

Abstract

We present the first simulated galaxy clusters (M200 > 1014 M⊙) 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.

Citation

Robertson, A., Massey, R., Eke, V., Tulin, S., Yu, H., Bahé, Y., …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. https://doi.org/10.1093/mnrasl/sly024

• Journal Article Type: Article
• Acceptance Date: Jan 30, 2018
• Online Publication Date: Feb 16, 2018
• Publication Date: May 1, 2018
• Deposit Date: Mar 29, 2018
• Publicly Available Date: Mar 30, 2018
• Journal: Monthly Notices of the Royal Astronomical Society: Letters
• Electronic ISSN: 1745-3933
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 476
• Issue: 1
• Pages: L20-L24
• DOI: https://doi.org/10.1093/mnrasl/sly024
• Public URL: https://durham-repository.worktribe.com/output/1336213