Ultra High Energy Cosmic Rays
Abstract
Description
The origin of the particles in the highest energy end of the cosmic ray spectrum is discussed in the context of the wider problem of the origin of the whole cosmic radiation as observed at the Earth. In particular we focus our attention on the acceleration problem and on the transition from galactic to extragalactic cosmic rays.
Invited Review to appear in the proceedings of the Vulcano 2006 Workshop "Frontier Objects in Astrophysics and Particle Physics"
Invited Review to appear in the proceedings of the Vulcano 2006 Workshop "Frontier Objects in Astrophysics and Particle Physics"