Ultra-High Energy Cosmic Rays and Diffuse Photon Spectrum

Details Ultra-High Energy Cosmic Rays and Diffuse Photon Spectrum Ultra-High Energy Cosmic Rays and Diffuse Photon Spectrum

1999-09-14

arxiv.org/abs/astro-ph/9909244v1

Astronomy and Astrophysics

Astrophysics

Talk given at XI Rencontres de Blois. 3 pages, no figures

Scientific paper

It is argued that if extragalactic magnetic fields are smaller than
2x10^{-12} G the flux of ultra-high energy photons of (a few)x10^{-1} eV
cm^{-2}s^{-1}sr^{-1} predicted in the top-down models of UHE CR implies similar
flux of the diffuse photons in the energy range 10^{15}-10^{17} eV, which is
close to the existing experimental limit.

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