# Theoretical and Experimental Topics on Ultra High Energy Cosmic Rays

Abstract : Since their first observation in 1962, the existence of Ultra High Energy Cosmic Rays (UHECR) remains a mystery in modern astrophysics. Those cosmic rays, with energies well above 50 EeV ($50\times 10^{18}$eV), can hardly be accelerated, even in the most active parts of our universe such as FR-II radio galaxies or AGNs, nor can they travel on distances larger than 100 Mpc. In the following some of the production and acceleration models for UHECR are reviewed and some of the transport issues are exposed. Finally the detection and identification on Earth of those cosmic bullets'' are presented.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00007008
Contributor : Jean-Michel Levy <>
Submitted on : Wednesday, November 22, 2000 - 5:49:01 PM
Last modification on : Tuesday, December 8, 2020 - 3:36:39 AM

### Citation

A. Letessier-Selvon. Theoretical and Experimental Topics on Ultra High Energy Cosmic Rays. Meeting on Fundamental Physics 27, Feb 2000, Cadiz, Spain. ⟨in2p3-00007008⟩

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