Brazilian Journal of Physics
On-line version ISSN 1678-4448
SIFFERT, Beatriz B.; LAZAROTTO, B.; MELLO NETO, J. R. T. de and OLINTO, Angela. Dark matter halos and the anisotropy of ultra-high energy cosmic rays in the Pierre Auger observatory. Braz. J. Phys. [online]. 2007, vol.37, n.1a, pp. 48-51. ISSN 1678-4448. http://dx.doi.org/10.1590/S0103-97332007000100016.
We analyze the cosmic ray arrival direction map that would be observed if the source of ultra high energy cosmic rays were the decay of dark matter particles in the halos of our galaxy and of the Andromeda galaxy (M31). To model the dark matter distribution throughout the halos we use two different density profiles, the Moore et al. and the Navarro-Frenk-White profile. The results show what would be seen by the Pierre Auger experiment, since we take into account its exposure. We evaluate the dipole and quadrupole terms for the resulting maps in the two density profiles cases and compare them with the terms expected for an isotropic sky.
Keywords : Dark matter; Ultra-high energy cosmic rays; Pierre Auger experiment.