Cosmic ray physics and AUGER latest results
Cosmic ray physics and AUGER latest results
Cosmic ray physics and AUGER latest results
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High energy CR propagation<br />
■<br />
■<br />
■<br />
■<br />
CR above ~10 19 eV have large rigidities → easily escape<br />
from galaxies<br />
Interact mostly in the extragalactic medium: dominated<br />
by radiation!<br />
Protons: photo-pair production <strong>and</strong> photo-pion<br />
production (from CMB photons)<br />
Heavier nuclei: photo-dissociation (from CMB photons<br />
<strong>and</strong> IR-Visible-UV background)<br />
Paris, 9 th June 2008 — IDAPPʼs two days 2008 — E. Parizot (APC / Univ. Paris 7)