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Secondary gamma rays from ultrahigh energy cosmic rays produced in magnetized environments

Abstract : Nearby sources of cosmic rays up to a ZeV(=$10^21 eV) could be observed with a multimessenger 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 can be enhanced by a factor ~10 at Gev energies and by a factor of a few at TeV energies, compared to unmagnetized sources. Particularly enhanced are synchrotron and cascade photons from $e^+e^-$ pairs produced by protons from sources with relatively steep injection spectra [proportional]$E^-2.6.$ Such sources should be visible at the same time in ultrahigh energy cosmic ray experiments and gamma-ray telescopes.
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http://hal.in2p3.fr/in2p3-00086232
Contributor : Simone Lantz Connect in order to contact the contributor
Submitted on : Tuesday, July 18, 2006 - 11:47:41 AM
Last modification on : Wednesday, November 17, 2021 - 12:30:20 PM

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E. Armengaud, G. Sigl, F. Miniati. Secondary gamma rays from ultrahigh energy cosmic rays produced in magnetized environments. Physical Review D, American Physical Society, 2006, 73, pp.083008. ⟨10.1103/PhysRevD.73.083008⟩. ⟨in2p3-00086232⟩

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