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Ultra-High Energy Cosmic Rays from Quasar Remnants
C. Isola, G. Sigl, G. Bertone
One of the models recently proposed to explain the origin of the ultra high energy cosmic rays assumes that these particles may be accelerated by the electromotive force around pre…
Ultra-High Energy Neutrino Fluxes: New Constraints and Implications
Dmitry Semikoz, Guenter Sigl
We apply new upper limits on neutrino fluxes and the diffuse extragalactic component of the GeV gamma-ray flux to various scenarios for ultra high energy cosmic rays and neutrinos.…
Signatures of Magnetized Large Scale Structure in Ultra-High Energy Cosmic Rays
Guenter Sigl, Francesco Miniati, Torsten Ensslin
We investigate the impact of a structured universe in the multi-pole moments, auto-correlation function, and cluster statistics of cosmic rays above 10^19 eV. We compare structured…
Gravitational Effects on Particle Dark Matter and Indirect Detection
Guenter Sigl, Gianfranco Bertone
The annihilation signal of particle dark matter can be strongly enhanced in over-dense regions such as close to the Galactic centre. We summarize some of our recent results on flux…
Ultra-High Energy Cosmic Rays in a Structured and Magnetized Universe
Guenter Sigl, Francesco Miniati, Torsten Ensslin
We simulate propagation of cosmic ray nucleons above 10^{19} eV in scenarios where both the source distribution and magnetic fields within about 50 Mpc from us are obtained from an…