Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-03-11
Astropart.Phys. 12 (1999) 25-34
Astronomy and Astrophysics
Astrophysics
21 pages, 6 figures (ps), Astroparticle Physics (accepted for publication)
Scientific paper
10.1016/S0927-6505(99)00071-7
Several explanations for the existence of Ultra High Energy Cosmic Rays invoke the idea that they originate from the decay of massive particles created in the reheating following inflation. It has been suggested that the decay products can explain the observed isotropic flux of cosmic rays. We have calculated the anisotropy expected for various models of the dark matter distribution and find that at present data are too sparse above $4 \times 10^{19}$ eV to discriminate between different models. However we show that with data from three years of operation of the southern section of the Pierre Auger Observatory significant progress in testing the proposals will be made.
Medina Tanco Gustavo
Watson Alan Andrew
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