Constraints on Dark Matter Properties - K Romer.pdf (1.47 MB)
Constraints on dark matter properties from observations of Milky Way satellite galaxies
journal contribution
posted on 2023-06-10, 00:47 authored by E O Nadler, A Drlica-Wagner, K Bechtol, S Mau, R H Wechsler, V Gluscevic, K Boddy, A B Pace, T S Li, M McNanna, A H Riley, J García-Bellido, Y Y Mao, G Green, Kathy RomerKathy Romer, DES Collaboration, othersWe 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, ?fs?10h-1 kpc), (ii) the velocity-independent DM-proton scattering cross section, s0<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, mf>2.9×10-21 eV (de Broglie wavelength, ?dB?0.5 kpc). These constraints are complementary to other observational and laboratory constraints on DM properties.
History
Publication status
- Published
File Version
- Accepted version
Journal
Physical Review LettersISSN
0031-9007Publisher
American Physical SocietyExternal DOI
Issue
9Volume
126Article number
a091101Event location
United StatesDepartment affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2021-08-31First Open Access (FOA) Date
2021-08-31First Compliant Deposit (FCD) Date
2021-08-27Usage metrics
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