Gamma-ray signatures of annihilation to charged leptons in dark matter substructure

Details Gamma-ray signatures of annihilation to charged leptons in dark matter substructure Gamma-ray signatures of annihilation to charged leptons in dark matter substructure

2009-09-02

arxiv.org/abs/0909.0519v3

Phys.Rev.D81:103521,2010

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

8 pages, 4 figures; minor updates to match published version

Scientific paper

10.1103/PhysRevD.81.103521

Due to their higher concentrations and small internal velocities, Milky Way subhalos can be at least as important as the smooth halo in accounting for the GeV positron excess via dark matter annihilation. After showing how this can be achieved in various scenarios, including in Sommerfeld models, we demonstrate that, in this case, the diffuse inverse-Compton emission resulting from electrons and positrons produced in substructure leads to a nearly-isotropic signal close to the level of the isotropic GeV gamma-ray background seen by Fermi. Moreover, we show that HESS cosmic-ray electron measurements can be used to constrain multi-TeV internal bremsstrahlung gamma rays arising from annihilation to charged leptons.

Affiliated with

Also associated with

No associations

Rating

Gamma-ray signatures of annihilation to charged leptons in dark matter substructure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Gamma-ray signatures of annihilation to charged leptons in dark matter substructure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma-ray signatures of annihilation to charged leptons in dark matter substructure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-663230