Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf..183b&link_type=abstract
"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes
Astronomy and Astrophysics
Astrophysics
Scientific paper
We calculate the horizons of ultra high energy cosmic rays assuming different nuclei primaries ranging from proton to iron at ultra high energies (>6\cdot10^{19}). We show that sources of ultra high energy protons and heavy nuclei can originate from distances up to ˜ 180 Mpc, while low and intermediate mass nuclei can only originate in the local universe (< 50 Mpc.)
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