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Transition from Galactic to Extra-Galactic Cosmic Rays

Roberto Aloisio

astro-pharXiv:astro-ph/0602083

Abstract

In this paper we review the main features of the observed Cosmic Rays spectrum in the energy range 1017 eV~÷~1020 eV. We present a theoretical model that explains the main observed features of the spectrum, namely the second Knee and Dip, and implies a transition from Galactic to Extra-Galactic cosmic rays at energy E 1018 eV, with a proton dominated Extra-Galactic spectrum.

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