Extracting limits on dark matter annihilation from gamma ray observations towards dwarf spheroidal galaxies

2012 ◽  
Vol 86 (2) ◽  
Author(s):  
Ilias Cholis ◽  
Paolo Salucci
Keyword(s):  
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

scholarly journals Dark Matter Limits from Dwarf Spheroidal Galaxies with the HAWC Gamma-Ray Observatory

2018 ◽  
Vol 853 (2) ◽  
pp. 154 ◽  
Author(s):  
A. Albert ◽  
R. Alfaro ◽  
C. Alvarez ◽  
J. D. Álvarez ◽  
R. Arceo ◽  
...  
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies
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