July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Understanding the anisotropy of cosmic rays at TeV and PeV energies

Jul 30, 2015, 3:30 PM
Amazon Foyer (World Forum)

Amazon Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 182
Poster contribution CR-TH Poster 1 CR


Martin Pohl (DESY)


The anisotropy in cosmic-ray arrival directions in the TeV-PeV energy range shows both large and small-scale structures. While the large-scale anisotropy may arise from diffusive propagation of cosmic rays, the origin of the small-scale structures remains unclear. We perform three-dimensional Monte-Carlo test-particle simulations, in which the particles propagate in both magnetostatic and electromagnetic turbulence derived from a three-dimensional isotropic power spectrum. However, in contrast to earlier studies, we do not use a backtracking method for the computation of the particle trajectories, and hence anisotropy must build up from a large-scale isotropic (or dipole) boundary condition. It has been recently argued that the turbulent magnetic field itself generates the small-scale structures of the anisotropy if a global cosmic-ray dipole moment is present. Our code is well suited to test that hypothesis. We also investigate the impact of a finite phase velocity of interstellar turbulence.
Registration number following "ICRC2015-I/" 82
Collaboration -- not specified --

Primary author

Mr Robert Rettig (Universitaet Potsdam)


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