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astro-ph1999
UHECR Anisotropy and the Galactic Halo
Gustavo Medina Tanco, Alan A. Watson
Several explanations for the existence of Ultra High Energy Cosmic Rays (UHECR) invoke the idea that they originate from the decay of massive particles created in the reheating fol…
astro-ph1999
UHECR spectrum: the spatial distribution of the sources
Gustavo Medina Tanco
The Ultra-high energy cosmic ray energy spectrum summarized by the AGASA collaboration indicates clearly that the cosmic ray spectrum extends well beyond the Greisen-Zatsepin-Kuzmi…
astro-ph1999
Origin and Propagation of Ultra-High Energy Cosmic Rays
Gustavo A. Medina Tanco, Elisabete M. de Gouveia Dal Pino, Jorge E. Horvatth
The existence of cosmic ray particles up to the ultra-high energy limit (> 10^20 eV) is now beyond any doubt. The detection of cosmic particles with such energies imposes a challen…