Astronomy with ultra high-energy particles
Abstract
Recent measurements of the properties of cosmic rays above 1017 eV are summarized and implications on our contemporary understanding of their origin are discussed. Cosmic rays with energies exceeding 1020 eV have been measured, they are the highest-energy particles in the Universe. Particles at highest energies are expected to be only marginally deflected by magnetic fields and they should point towards their sources on the sky. Recent results of the Pierre Auger Observatory have opened a new window to the Universe - astronomy with ultra high-energy particles.
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