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research article

From dwarf galaxies to galaxy clusters: Self-Interacting Dark Matter over 7 orders of magnitude in halo mass

Bondarenko, Kyrylo  
•
Sokolenko, Anastasia
•
Boyarsky, Alexey
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January 1, 2021
Journal Of Cosmology And Astroparticle Physics

In this paper we study the density profiles of self-interacting dark matter (SIDM) haloes spanning the full observable mass range, from dwarf galaxies to galaxy clusters. Using realistic simulations that model the baryonic physics relevant for galaxy formation, we compare the density profiles of haloes simulated with either SIDM or cold and collisionless dark matter (CDM) to those inferred from observations of stellar velocity dispersion, gas rotation curves, weak and strong gravitational lensing, and/or X-ray maps. We make our comparison in terms of the maximal surface density of haloes, circumventing the need for semi-analytic or parametric models for dark matter density profiles. We find that the maximal surface density as a function of halo mass is well reproduced by CDM simulations that include baryons, while for SIDM with a velocity-independent cross-section of 1 cm(2)/g, the simulated galaxy clusters have mean maximal surface densities that are below those of observed systems by an amount greater than the standard deviation of the observed maximal surface density at fixed mass. For less massive systems both CDM and SIDM agree with the observation equally well.

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Type
research article
DOI
10.1088/1475-7516/2021/01/043
Web of Science ID

WOS:000620675000043

Author(s)
Bondarenko, Kyrylo  
•
Sokolenko, Anastasia
•
Boyarsky, Alexey
•
Robertson, Andrew
•
Revaz, Yves  
Date Issued

2021-01-01

Publisher

IOP PUBLISHING LTD

Published in
Journal Of Cosmology And Astroparticle Physics
Issue

1

Start page

043

Subjects

Astronomy & Astrophysics

•

Physics, Particles & Fields

•

Physics

•

dark matter simulations

•

hydrodynamical simulations

•

dark matter theory

•

rotation curves of galaxies

•

interaction cross-section

•

cosmological simulations

•

stellar-mass

•

observable tests

•

constraints

•

density

•

contraction

•

evolution

•

cores

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPPC  
LASTRO  
Available on Infoscience
March 26, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/176722
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