Cores in dwarf galaxies from dark matter with a Yukawa potential

Abraham Loeb, Neal Weiner

    Research output: Contribution to journalArticle

    Abstract

    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.

    Original languageEnglish (US)
    Article number171302
    JournalPhysical Review Letters
    Volume106
    Issue number17
    DOIs
    StatePublished - Apr 28 2011

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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