Nadler, EO;
Drlica-Wagner, A;
Bechtol, K;
Mau, S;
Wechsler, RH;
Gluscevic, V;
Boddy, K;
... Wester, W; + view all
(2021)
Constraints on Dark Matter Properties from Observations of Milky Way Satellite Galaxies.
Physical Review Letters
, 126
(9)
, Article 091101. 10.1103/PhysRevLett.126.091101.
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Abstract
We perform a comprehensive study of Milky Way (MW) satellite galaxies to constrain the fundamental properties of dark matter (DM). This analysis fully incorporates inhomogeneities in the spatial distribution and detectability of MW satellites and marginalizes over uncertainties in the mapping between galaxies and DM halos, the properties of the MW system, and the disruption of subhalos by the MW disk. Our results are consistent with the cold, collisionless DM paradigm and yield the strongest cosmological constraints to date on particle models of warm, interacting, and fuzzy dark matter. At 95% confidence, we report limits on (i) the mass of thermal relic warm DM, mWDM>6.5 keV (free-streaming length, λfs≲10h-1 kpc), (ii) the velocity-independent DM-proton scattering cross section, σ0<8.8×10-29 cm2 for a 100 MeV DM particle mass [DM-proton coupling, cp≲(0.3 GeV)-2], and (iii) the mass of fuzzy DM, mφ>2.9×10-21 eV (de Broglie wavelength, λdB≲0.5 kpc). These constraints are complementary to other observational and laboratory constraints on DM properties.
| Type: | Article |
|---|---|
| Title: | Constraints on Dark Matter Properties from Observations of Milky Way Satellite Galaxies |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.126.091101 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.126.091101 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10124780 |
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