The Arrival Direction Distribution of Extremely High Energy Cosmic Rays Observed by AGASA

Details The Arrival Direction Distribution of Extremely High Energy Cosmic Rays Observed by AGASA The Arrival Direction Distribution of Extremely High Energy Cosmic Rays Observed by AGASA

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....1..437t&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

10

Scientific paper

Study of the arrival direction distribution plays a key role in finding sources of the Extremely High Energy Cosmic Rays (EHECR). Greisen-Zatsepin-Kuz'min (GZK) mechanism [1,2] limits the propagation of EHE cosmic rays significantly and only nearby sources can contribute to the local EHECR flux[3-6]. Furthermore EHECRs travel intergalactic spaces almost linearly. Hence, we expect they can be traced back to their sources. Here we report a small-sacle anisotropy of the arrival direction distribution of EHECRs observed by AGASA above 1019 eV . This result strongly suggests the existence of point sources of EHECRs.

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