Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...725.2110s&link_type=abstract
The Astrophysical Journal, Volume 725, Issue 2, pp. 2110-2116 (2010).
Astronomy and Astrophysics
Astronomy
3
Diffusion, Magnetic Fields, Turbulence
Scientific paper
The propagation of cosmic rays in the Galaxy is controlled by spatial diffusion coefficients. Since parallel scattering is the strongest scattering effect, it is believed that the diffusion coefficient along the mean magnetic field controls the confinement of charged cosmic particles in the Galaxy. In this paper, we combine a turbulence spectrum with dissipation range with a nonlinear particle diffusion theory to compute transport parameters. We find a decreasing parallel diffusion coefficient for increasing particle energy for particles having rigidities lower than 3 GeV. Our approach provides an explanation of the observed boron-to-carbon ratio at these particle energies without the need to introduce stochastic acceleration.
Büsching Ingo
Shalchi Andreas
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