Physics – Nuclear Physics
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.136..250y&link_type=abstract
Nuclear Physics B, Volume 136, p. 250-255.
Physics
Nuclear Physics
Scientific paper
We present a method for calculating arrival distribution of Ultra-High Energy Cosmic Rays (UHECRs) including modifications by the galactic magnetic field. We perform numerical simulations of UHE anti-protons, which are injected isotropically at the earth, in the Galaxy and record the directions of velocities at the earth and outside the Galaxy for all of the trajectories. We then select some of them so that the resultant mapping of the velocity directions outside the Galaxy of the selected trajectories corresponds to a given source location scenario, applying Liouville's theorem. Using this method for our source location scenario which is adopted in our recent study and can explain the AGASA observation above 4 × 1019 eV, we calculate the arrival distribution of UHECRs including lower energy (E > 1019 eV) ones. We find that our source model can reproduce the AGASA experiment. We also demonstrate the UHECR arrival distribution with the event number expected by future experiments in the next few years.
Nagataki Shigehiro
Sato Katsuhiko
Yoshiguchi Hiroyuki
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