Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.171302
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Funding
- NSF [AST-0907890, 0947827]
- NASA [NNX08AL43G, NNA09DB30A]
- DOE [DE-FG02-06ER41417]
- Amborse Monell Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [0947827] Funding Source: National Science Foundation
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We show that cold dark matter particles interacting through a Yukawa potential could naturally explain the recently observed cores in dwarf galaxies without affecting the dynamics of objects with a much larger velocity dispersion, such as clusters of galaxies. The velocity dependence of the associated cross section as well as the possible exothermic nature of the interaction alleviates earlier concerns about strongly interacting dark matter. Dark matter evaporation in low-mass objects might explain the observed deficit of satellite galaxies in the Milky Way halo and have important implications for the first galaxies and reionization.
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