Dresden 2013 – scientific programme

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T: Fachverband Teilchenphysik

T 21: Astroteilchenphysik und Kosmologie (Theorie)

T 21.6: Talk

Wednesday, March 6, 2013, 18:00–18:15, WIL-B122

Analyzing the propagation of cosmic rays — •Robert Rettig — Universität Potsdam, Institut für Physik und Astronomie, Karl-Liebknecht-Strasse 24/25, 14476 Potsdam

The origin of cosmic rays is still unknown. In addition to studying potential sources, one can also investigate the propagation of these particles from their sources to Earth, which is a transition from a diffusive mode to ballistic trajectories at very high energies. For that purpose, we investigate the early-time charged particle transport using numerical three-dimensional Monte-Carlo test-particle simulations, in which the test-particles propagate in a time-independent spatially fluctuating magnetic field derived from a three-dimensional isotropic turbulence power spectrum. To avoid the superluminal transport appearing in a classical treatment of diffusion processes, the Jüttner distribution, originally derived to be the relativistic Maxwell distribution, has been proposed to describe the propagation of ultra high energy cosmic rays. With regard to the anisotropy measured at high energies, we can test whether a propagator based on the Jüttner distribution correctly describes the particle transport at the highest energies.