Cosmic Gamma-ray from Inverse Compton Process in Unstable Dark Matter Scenario

Details Cosmic Gamma-ray from Inverse Compton Process in Unstable Dark Matter Scenario Cosmic Gamma-ray from Inverse Compton Process in Unstable Dark Matter Scenario

2009-05-28

arxiv.org/abs/0905.4593v1

Phys.Lett.B679:1-5,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

11 pages, 4 figures

Scientific paper

10.1016/j.physletb.2009.07.004

Motivated by the PAMELA anomaly in the fluxes of cosmic-ray electron and positron, we study the cosmic gamma-ray induced by the inverse Compton (IC) scattering process in unstable dark matter scenario assuming that the anomaly is due to the electron and positron emission by the decay of dark matter. We calculate the fluxes of IC-induced gamma-ray produced in our Galaxy and that from cosmological distance, and show that both of them are significant. If the gamma-ray flux is precisely determined by Fermi Gamma-ray Space Telescope for various line-of-sight directions, it will provide an important test of the decaying dark matter scenario.

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