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Astrophysics

arXiv:0706.2158 (astro-ph)
[Submitted on 14 Jun 2007]

Title:Ultra High Energy Cosmic Rays Diffusion in an Expanding Universe

Authors:R. Aloisio, V. Berezinsky, A. Gazizov
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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.
Comments: To appear in the proceedings of 30th International Cosmic Ray Conference (ICRC 2007), Merida, Yucatan, Mexico, 3-11 Jul 2007
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0706.2158 [astro-ph]
  (or arXiv:0706.2158v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0706.2158

Submission history

From: Roberto Aloisio [view email]
[v1] Thu, 14 Jun 2007 16:51:18 UTC (209 KB)
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