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Constraints on top-down models for the origin of UHECRs from the Pierre Auger Observatory data

D.V. Semikoz 1
1 APC - THEORIE
APC (UMR_7164) - AstroParticule et Cosmologie, Institut für theoretische Physik
Abstract : Taking into account the Pierre Auger Observatory limits on the photon fraction among the highest energy cosmic rays, we show that the models based on the decay of super-heavy dark matter in the halo of our Galaxy are essentially excluded from being the sources of UHECRs unless their contribution becomes significant only above 100 EeV. Some top-down models based on topological defects are however compatible with the current data and may be best constrained in the future by the high-energy neutrino flux limit.
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http://hal.in2p3.fr/in2p3-00169661
Contributor : Simone Lantz <>
Submitted on : Tuesday, September 4, 2007 - 3:39:50 PM
Last modification on : Wednesday, October 21, 2020 - 4:32:14 PM

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D.V. Semikoz. Constraints on top-down models for the origin of UHECRs from the Pierre Auger Observatory data. 30th International Cosmic Ray Conference - ICRC'07, Jul 2007, Merida, Mexico. pp.433-436. ⟨in2p3-00169661⟩

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