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

Research output: Contribution to journalArticle

  • External authors:
  • Andrew Robertson
  • Richard Massey
  • Vincent Eke
  • Sean Tulin
  • Hai Bo Yu
  • Yannick Bahé
  • David J. Barnes
  • Richard G. Bower
  • Robert A. Crain
  • Claudio Dalla Vecchia
  • Matthieu Schaller
  • Joop Schaye


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

Bibliographical metadata

Original languageEnglish
Pages (from-to)L20-L24
JournalMonthly Notices of the Royal Astronomical Society: Letters
Issue number1
Early online date16 Feb 2018
Publication statusPublished - 1 May 2018