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Document Version Version Comment Date Status
693899.0 [No comment] 28.05.2018 16:41 Released

ID: 693899.0, MPI für Astronomie / Publikationen_mpia
Hints on the nature of dark matter from the properties of Milky Way satellites
Authors:Anderhalden, Donnino; Schneider, Aurel; Macciò, Andrea V.; Diemand, Juerg; Bertone, Gianfranco
Date of Publication (YYYY-MM-DD):2013-01
Title of Journal:Journal of Cosmology and Astro-Particle Physics
Start Page:id. 014
Review Status:Internal review
Audience:Experts Only
Abstract / Description:The nature of dark matter is still unknown and one of the most fundamental scientific mysteries. Although successfully describing large scales, the standard cold dark matter model (CDM) exhibits possible shortcomings on galactic and sub-galactic scales. It is exactly at these highly non-linear scales where strong astrophysical constraints can be set on the nature of the dark matter particle. While observations of the Lyman-α forest probe the matter power spectrum in the mildly non-linear regime, satellite galaxies of the Milky Way provide an excellent laboratory as a test of the underlying cosmology on much smaller scales. Here we present results from a set of high resolution simulations of a Milky Way sized dark matter halo in eight distinct cosmologies: CDM, warm dark matter (WDM) with a particle mass of 2 keV and six different cold plus warm dark matter (C+WDM) models, varying the fraction, fwdm, and the mass, mwdm, of the warm component. We used three different observational tests based on Milky Way satellite observations: the total satellite abundance, their radial distribution and their mass profile. We show that the requirement of simultaneously satisfying all three constraints sets very strong limits on the nature of dark matter. This shows the power of a multi-dimensional small scale approach in ruling out models which would be still allowed by large scale observations.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:1475-7516 %R 10.1088/1475-7516/2013/03/014 [ID No:1]
URL:http://cdsads.u-strasbg.fr/abs/2013JCAP...03..014A [ID No:2]