Relieving tensions related to the dark matter interpretation of the Fermi-LAT data

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Abstract

Recently, many studies indicate that the GeV gamma ray excess signal from the central Milky Way can be best explained by ∼40–50 GeV dark matter annihilating via the bb channel. However, this model appears to be disfavored by the recent Fermi-LAT data for dwarf spheroidal galaxies and the constraint from synchrotron radiation. In this article, we describe a consistent picture to relieve the tensions between the dark matter annihilation model and the observations. We show that a baryonic feedback process is the key to alleviate the tensions and the ∼40–50 GeV dark matter model is still the best one to account for the GeV gamma ray excess in the Milky Way. Copyright © 2018 by the author.
Original languageEnglish
Article number92
JournalGalaxies
Volume6
Issue number3
Early online dateAug 2018
DOIs
Publication statusPublished - Sep 2018

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relieving
dark matter
gamma rays
dwarf galaxies
synchrotron radiation

Citation

Chan, M. H. (2018). Relieving tensions related to the dark matter interpretation of the Fermi-LAT data. Galaxies, 6(3). Retrieved from https://doi.org/10.3390/galaxies6030092

Keywords

  • Dark matter
  • Gamma rays