Small Scale Anisotropies of UHECRs from Super-Heavy Halo Dark Matter

Details Small Scale Anisotropies of UHECRs from Super-Heavy Halo Dark Matter Small Scale Anisotropies of UHECRs from Super-Heavy Halo Dark Matter

2001-08-17

arxiv.org/abs/astro-ph/0108288v1

Astronomy and Astrophysics

Astrophysics

Contribution given at ICRC 2001 - August 7-15, 2001 - Hamburg

Scientific paper

The decay of very heavy metastable relics of the Early Universe can produce ultra-high energy cosmic rays (UHECRs) in the halo of our own Galaxy. In this model, no Greisen-Zatsepin-Kuzmin cutoff is expected because of the short propagation distances. We show here that, as a consequence of the hierarchical build up of the halo, this scenario predicts the existence of small scale anisotropies in the arrival directions of UHECRs, in addition to a large scale anisotropy, known from previous studies. We also suggest some other observable consequences of this scenario which will be testable with upcoming experiments, as Auger, EUSO and OWL.

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