Constraints on Dark Matter Properties from Observations of Milky Way Satellite Galaxies
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PhysRevLett.126.091101.pdf
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DES CollaborationAffiliation
Department of Astronomy/Steward Observatory, University of ArizonaIssue Date
2021
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American Physical SocietyCitation
Nadler, E. O., Drlica-Wagner, A., Bechtol, K., Mau, S., Wechsler, R. H., Gluscevic, V., ... & DES Collaboration. (2021). Constraints on Dark Matter Properties from Observations of Milky Way Satellite Galaxies. Physical review letters, 126(9), 091101.Journal
Physical Review LettersRights
Copyright © 2021 American Physical Society.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.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. © 2021 American Physical Society.Note
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0031-9007Version
Final published versionae974a485f413a2113503eed53cd6c53
10.1103/PhysRevLett.126.091101