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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Anisotropic diffusion of Galactic cosmic ray protons and their steady-state azimuthal distribution
Astronomy and Astrophysics, Volume 547, Article A120, Year 2012
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Description
Galactic transport models for cosmic rays involve the diffusive motion of these particles in the interstellar medium. Owing to the large-scale structured Galactic magnetic field, this diffusion is anisotropic with respect to the local field direction. We included this transport effect along with continuous loss processes in a quantitative model of Galactic propagation for cosmic ray protons that is based on stochastic differential equations. We calculated energy spectra at different positions along the Sun's Galactic orbit and compared them to the isotropic diffusion case. The results show that a larger amplitude of variation and different spectral shapes are obtained in the introduced anisotropic diffusion scenario, which in turn emphasizes the need for accurate Galactic magnetic field models. © 2012 ESO.
Authors & Co-Authors
Effenberger, Frederic
Germany, Bochum
Ruhr-universitat Bochum
Fichtner, Horst
Germany, Bochum
Ruhr-universitat Bochum
Scherer, Klaus
Germany, Bochum
Ruhr-universitat Bochum
Büsching, Ingo
Germany, Bochum
Ruhr-universitat Bochum
Statistics
Citations: 55
Authors: 4
Affiliations: 1
Identifiers
Doi:
10.1051/0004-6361/201220203
ISSN:
14320746
Study Approach
Quantitative