Propagation of Ultra High Energy Protons over Cosmological Distances and Implications for Topological Defect Models

Details Propagation of Ultra High Energy Protons over Cosmological Distances and Implications for Topological Defect Models Propagation of Ultra High Energy Protons over Cosmological Distances and Implications for Topological Defect Models

1995-06-23

arxiv.org/abs/astro-ph/9506119v1

Astropart.Phys. 4 (1996) 253

Astronomy and Astrophysics

Astrophysics

32 pages, uuencoded postscript, also available from http://www.physics.adelaide.edu.au/astrophysics/

Scientific paper

10.1016/0927-6505(95)00039-9

We describe the results of a hybrid matrix--Monte Carlo calculation of cascading of UHE cosmic rays and $\gamma$-rays through the cosmic background radiation fields over cosmological distances. We calculate the $\gamma$-ray and neutrino emission that results from the cascade, as well as the effect of cascading on the primary spectrum. We discuss the results for various cosmic ray injection spectra and primary species. Certain models for the production of the highest energy cosmic rays are ruled out.

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