Roberto Iuppa, for the ARGO-YBJ Collaboration
Important informations on the origin and the propagation mechanisms of cosmic
rays may be provided by the measurement of the anisotropies of their arrival
direction. In this paper the observation of anisotropy regions at different
angular scales is reported. In particular, the observation of a possible
anisotropy on scales between $\sim10^{\circ}$ and $\sim30^{\circ}$ may be a
key-detection for speculations on the presence of unknown features of the
magnetic fields the charged cosmic rays propagate through, as well as to
potential contributions of nearby sources to the total flux of cosmic rays.
Evidence of new weaker few-degree excesses throughout the sky region
$195^{\circ}\leq$ R.A. $\leq 315^{\circ}$ is also reported.
View original:
http://arxiv.org/abs/1112.2375
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