THE TELEGRAPH APPROXIMATION FOR FOCUSED COSMIC-RAY TRANSPORT IN THE PRESENCE OF BOUNDARIES

Journal Article · Sat Jun 20 00:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/806/2/217· OSTI ID:22522272

Litvinenko, Yuri E.; Effenberger, Frederic ^[1]; Schlickeiser, Reinhard ^[2]

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1. Department of Mathematics, University of Waikato, P. B. 3105, Hamilton (New Zealand)
2. Institut für Theoretische Physik, Lehrstuhl IV: Weltraum- und Astrophysik, Ruhr-Universität Bochum, D-44780 Bochum (Germany)

Diffusive cosmic-ray transport in nonuniform large-scale magnetic fields in the presence of boundaries is considered. Reflecting and absorbing boundary conditions are derived for a modified telegraph equation with a convective term. Analytical and numerical solutions of illustrative boundary problems are presented. The applicability and accuracy of the telegraph approximation for focused cosmic-ray transport in the presence of boundaries are discussed, and potential applications to modeling cosmic-ray transport are noted.

• OSTI ID: 22522272
• Journal Information: Astrophysical Journal, Vol. 806, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCURACY
APPROXIMATIONS
BOUNDARY CONDITIONS
COMPUTERIZED SIMULATION
COSMIC RADIATION
COSMIC RAY PROPAGATION
DIFFUSION
INTERSTELLAR MAGNETIC FIELDS
NUMERICAL SOLUTION
SCATTERING
STARS