Ultra High Energy Cosmic Rays Diffusion in an Expanding Universe
Astrophysics
2007-06-15 v1
Abstract
We study the solution of the diffusion equation for Ultra-High Energy Cosmic Rays in the general case of an expanding universe, comparing it with the well known Syrovatsky solution obtained in the more restrictive case of a static universe. The formal comparison of the two solutions with all parameters being fixed identically reveals an appreciable discrepancy. This discrepancy is less important if in both models a different set of best-fit parameters is used.
Cite
@article{arxiv.0706.2158,
title = {Ultra High Energy Cosmic Rays Diffusion in an Expanding Universe},
author = {R. Aloisio and V. Berezinsky and A. Gazizov},
journal= {arXiv preprint arXiv:0706.2158},
year = {2007}
}