158 articles – 1990 Notices  [english version]
 HAL : in2p3-00025379, version 1
 29th International Cosmic Ray Conference (ICRC 2005), Pune : Inde
 EUSO science
 EUSO Collaboration(s)
 (2005)
 EUSO is a mission to explore the extreme universe by the probe of Ultra High Energy Cosmic Rays (UHECRs) and UHE neutrinos. EUSO monitors a gigantic volume of atmosphere from Space and measures showers induced by UHECRs and UHE neutrinos. Scientifically, it is important to measure the energy spectrum of UHECRs well beyond GZK energy with high statistics. EUSO ensures the observation of UHECRs up to 10$^{21}$eV even in the case of GZK mechanism working, and gives us a clear picture of the existence / non-existence of the GZK effect and the behavior of the spectrum beyond GZK energy, which represents the contributions from nearby sources. The anisotropy study of UHECR arrival directions in a small scale angle above GZK energy may allow us to identify individual source, because of the limited propagation distance and the high rigidity of particles. If event clusters observed by AGASA are real, it is expected from Monte Carlo simulation that EUSO will see ~100 particles from individual brightest sources and will give us a good opportunity to test the relativity in high precision. The UHE neutrino is a unique channel to explore the universe much deeper than UHECRs. EUSO essentially can measure UHE neutrinos free from background proton showers. The number of GZK neutrino events in a EUSO three years' mission is expected to be only a few. Nevertheless, it is a definitely conceivable opportunity to begin UHE neutrino astrophysics at GZK energy.
 Thème(s) : Physique/Astrophysique/Cosmologie et astrophysique extra-galactiquePlanète et Univers/Astrophysique
Liste des fichiers attachés à ce document :
 PDF
 EUSO_science.pdf(478.2 KB)
 in2p3-00025379, version 1 http://hal.in2p3.fr/in2p3-00025379 oai:hal.in2p3.fr:in2p3-00025379 Contributeur : Emmanuelle Vernay <> Soumis le : Jeudi 12 Janvier 2006, 15:47:16 Dernière modification le : Lundi 20 Novembre 2006, 17:13:10