Fluxes of diffuse gamma rays and neutrinos from cosmic-ray interactions with the circumgalactic gas
Abstract
The Milky Way is surrounded by a gravitationally bound gas corona extending up to the Galaxy's virial radius. Interactions of cosmic-ray particles with this gas give rise to energetic secondary gamma rays and neutrinos. We present a quantitative analysis of the neutrino and gamma-ray fluxes from the corona of the Milky Way together with a combined contribution of coronae of other galaxies. The high-energy neutrino flux is insufficient to explain the IceCube results, while the contribution to the FERMI-LAT diffuse gamma-ray flux is not negligible.
- Publication:
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Physical Review D
- Pub Date:
- September 2016
- DOI:
- 10.1103/PhysRevD.94.063013
- arXiv:
- arXiv:1608.07421
- Bibcode:
- 2016PhRvD..94f3013K
- Keywords:
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- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 17 pages, 7 figures, revtex. V2: minor changes, version accepted by PRD