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Extragalatic Cosmic Rays Above the Iron Knee

  • Date May 18, 2016
  • Hour 3 pm
  • Room GSSI Main Lecture Hall
  • Speaker Andrew Taylor (DIAS - Dublin Institute for Advanced Studies)

ABSTRACT

Utilizing the recent Pierre Auger Observatory results on the Ultra High Energy Cosmic Rays, I will highlight the “hardness problem” for the intrinsic spectrum required. A potential resolution to this problem will be put forward. Connected to this, the issue of the over-contribution from extragalactic cosmic rays to the isotropic gamma-ray background will also be highlighted.