Gamma Ray Astronomy with Magnetized Zevatrons

Details Gamma Ray Astronomy with Magnetized Zevatrons Gamma Ray Astronomy with Magnetized Zevatrons

2005-11-09

arxiv.org/abs/astro-ph/0511277v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 ps figures

Scientific paper

Nearby sources of cosmic rays up to a ZeV(=10^21 eV) could be observed with a multi-messenger approach including secondary gamma-rays and neutrinos. If cosmic rays above ~10^18 eV are produced in magnetized environments such as galaxy clusters, the flux of secondary gamma-rays below ~1 TeV can be enhanced up to several orders of magnitudes compared to unmagnetized sources. A particular source of enhancement are synchrotron and cascade photons from e^+e^- pairs produced by protons from sources with relatively steep injection spectra proportional to E^-2.6. Such sources should be visible at the same time in ultra-high energy cosmic ray experiments and gamma-ray telescopes.

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