Computer Science
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ebhe.conf..307t&link_type=abstract
ENERGY BUDGET IN THE HIGH ENERGY UNIVERSE . Proceedings of the International Workshop. Held 22-24 February 2006 in Kashiwa, Japa
Computer Science
Scientific paper
We develop a new numerical method for simulations of the arrival distribution of Ultra-high Energy Cosmic Rays (UHECRs) above 1019 eV, taking their propagation in a structured magnetic field into account. This method enables us to save the CPU time greatly. Using this method, we calculate the propagation of UHE protons considering both a structured extragalactic magnetic field (EGMF) and the Galactic magnetic field, and simulate the arrival distribution. Our models of EGMF and UHECR source distribution reflect structures observed around the Milky Way. As an application, we compared our simulated arrival distribution with that observed by Akeno Grand Air Shower Array (AGASA) statistically. From this comparison, we find that the most appropriate number density of UHECR sources that best reproduces the AGASA observation is 10-4 - 10-5 Mpc-3, dependent on source types.
Sato Katsuhiko
Takami Hajime
Yoshiguchi Hiroyuki
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