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arXiv · 0704.2463

Ultra-High Energy Cosmic Rays and the GeV-TeV Diffuse Gamma-Ray Flux

Oleg E. Kalashev·Dmitry V. Semikoz·Guenter Sigl
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Abstract

Ultra-high energy cosmic ray protons accelerated in astrophysical objects produce secondary electromagnetic cascades during propagation in the cosmic microwave and infrared backgrounds. We show that such cascades can contribute between ~1% and ~50% of the GeV-TeV diffuse photon flux measured by the EGRET experiment. The GLAST satellite should have a good chance to discover this flux.

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Oleg E. Kalashev, Dmitry V. Semikoz, Guenter Sigl. 2007-04-19. Ultra-High Energy Cosmic Rays and the GeV-TeV Diffuse Gamma-Ray Flux. https://doi.org/10.1103/physrevd.79.063005

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