scholarly journals Effect of black holes in local dwarf spheroidal galaxies on gamma-ray constraints on dark matter annihilation

2014 ◽  
Vol 90 (10) ◽  
Author(s):  
Alma X. Gonzalez-Morales ◽  
Stefano Profumo ◽  
Farinaldo S. Queiroz
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Gamma Ray ◽  
Dark Matter Annihilation ◽  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies

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

Galaxies ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 92
Author(s):  
Man Chan
Keyword(s):  
Dark Matter ◽  
Synchrotron Radiation ◽  
Milky Way ◽  
Gamma Ray ◽  
Feedback Process ◽  
Dark Matter Annihilation ◽  
Dwarf Spheroidal Galaxies ◽  
Matter Model ◽  
Consistent Picture ◽  
Dark Matter Model

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.

scholarly journals Dark matter annihilation and decay in dwarf spheroidal galaxies: the classical and ultrafaint dSphs

2015 ◽  
Vol 453 (1) ◽  
pp. 849-867 ◽  
Author(s):  
V. Bonnivard ◽  
C. Combet ◽  
M. Daniel ◽  
S. Funk ◽  
A. Geringer-Sameth ◽  
...  
Keyword(s):  
Dark Matter ◽  
Dark Matter Annihilation ◽  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies
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