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Galaxies 2018, 6(3), 92; https://doi.org/10.3390/galaxies6030092

Relieving Tensions Related to the Dark Matter Interpretation of the Fermi-LAT Data

Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China
Received: 7 June 2018 / Revised: 17 August 2018 / Accepted: 20 August 2018 / Published: 29 August 2018
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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 b b ¯ 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. View Full-Text
Keywords: dark matter; gamma rays dark matter; gamma rays
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Chan, M.H. Relieving Tensions Related to the Dark Matter Interpretation of the Fermi-LAT Data. Galaxies 2018, 6, 92.

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