On the Origin of Highest Energy Cosmic Rays 1

  title={On the Origin of Highest Energy Cosmic Rays 1},
  author={G{\"u}nter Sigl and David N. Schramm and Pijushpani Bhattacharjee},
In this paper we show that the conventional diffusive shock acceleration mechanism for cosmic rays associated with relativistic astrophysical shocks in active galactic nuclei (AGNs) has severe difficulties to explain the highest energy cosmic ray events. We show that protons above around 2 × 10 eV could have marginally been produced by this mechanism in an AGN or a rich galaxy cluster not further away than around 100Mpc. However, for the highest energy Fly’s Eye and Yakutsk events this is… CONTINUE READING