On the propagation of the highest energy cosmic ray nuclei

Details On the propagation of the highest energy cosmic ray nuclei On the propagation of the highest energy cosmic ray nuclei

1998-08-11

arxiv.org/abs/astro-ph/9808104v1

JHEP 9810:009,1998

Astronomy and Astrophysics

Astrophysics

8 pages

Scientific paper

10.1088/1126-6708/1998/10/009

We study the propagation of ultra-high energy cosmic ray nuclei through the background of cosmic microwave and intergalactic infrared photons, using recent re-estimates for the density of the last ones. We perform a detailed Monte Carlo simulation to follow the disintegration histories of nuclei starting as Fe and reaching the Earth from extragalactic sources. We obtain the maximum energies of the arriving nuclear fragments as well as the mass composition as a function of the distance traveled. Cosmic rays with energies in excess of $2\times 10^{20}$ eV cannot originate from Fe nuclei produced in sources beyond 10 Mpc.

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