The intergalactic propagation of ultra-high energy cosmic ray nuclei

Details The intergalactic propagation of ultra-high energy cosmic ray nuclei The intergalactic propagation of ultra-high energy cosmic ray nuclei

2006-08-03

arxiv.org/abs/astro-ph/0608085v4

Astropart. Phys. 27 (2007) 199-212

Astronomy and Astrophysics

Astrophysics

19 pages, 51 figures; accepted for publication in Astroparticle Physics (with minor revisions)

Scientific paper

10.1016/j.astropartphys.2006.10.

We investigate the propagation of ultra-high energy cosmic ray nuclei (A = 1-56) from cosmologically distant sources through the cosmic radiation backgrounds. Various models for the injected composition and spectrum and of the cosmic infra-red background are studied using updated photo-disintegration cross-sections. The observational data on the spectrum and the composition of ultra-high energy cosmic rays are jointly consistent with a model where all of the injected primary cosmic rays are iron nuclei (or a mixture of heavy and light nuclei).

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