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

Bibcode
2018MNRAS.476L..20R
DOI
10.1093/mnrasl/sly024
Barnes, David J.; Bahé, Yannick; Yu, Hai-Bo; Eke, Vincent; Tulin, Sean; Massey, Richard; Robertson, A.; Bower, Richard G.; Crain, Robert A.; Dalla Vecchia, C.; Kay, Scott T.; Schaller, Matthieu; Schaye, Joop
Bibliographical reference

Monthly Notices of the Royal Astronomical Society: Letters, Volume 476, Issue 1, p.L20-L24

Advertised on:
5
2018
Number of authors
13
IAC number of authors
1
Citations
72
Refereed citations
65
Description
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.
Related projects
Project Image
Numerical Astrophysics: Galaxy Formation and Evolution
How galaxies formed and evolved through cosmic time is one of the key questions of modern astronomy and astrophysics. Cosmological time- and length-scales are so large that the evolution of individual galaxies cannot be directly observed. Only through numerical simulations can one follow the emergence of cosmic structures within the current
Claudio
Dalla Vecchia
In progress
Type
Refereed
Formation & Evolution of Galaxies (FYEG)
Astroparticle physics
Galaxies
Dark matter
Cosmology

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