Ultra High Energy Cosmic Rays: propagation in the Galaxy and anisotropy

Details Ultra High Energy Cosmic Rays: propagation in the Galaxy and anisotropy Ultra High Energy Cosmic Rays: propagation in the Galaxy and anisotropy

2000-06-24

arxiv.org/abs/astro-ph/0006349v3

Mod.Phys.Lett. A16 (2001) 2505-2515

Astronomy and Astrophysics

Astrophysics

13 pages, 6 figures, published version

Scientific paper

10.1142/S0217732301005990

We considered propagation of Ultra High Energy Cosmic Rays (UHECR) through the galaxy. We investigated models with sources of UHECR distributed in the same way as Cold Dark Matter (CDM) in a self-consistent way, taking into account both extra-galactic and Galactic contributions. Using a very simple toy model of galactic magnetic field we showed that in the case of galactic origin of UHECRs the anisotropy can reach considerable values. In the case of extragalactic UHECRs origin the anisotropy appears to be non-vanishing only for electron and photon components due to synchrotron losses, but it hardly can be reassured. The reason is an extremely low flux of UHE electrons and a too low level of gamma-ray anisotropy.

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