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The diffusion approximation and transport theory for cosmic rays in relativistic flowsEquations describing the transport of cosmic rays in relativistic flows in the diffusion approximation are obtained. The analysis is based on the zeroth, first, and second differential moment equations of the relativistic Boltzmann equation with a BGK collision term. A perturbation solution of the moment equations in the diffusion approximation yields both the co-moving frame particle current and viscous stresses. The resultant cosmic-ray continuity equation contains three readily recognized energy change terms: the adiabatic energy change term; the viscous shear energy change term; and a term proportional to the scalar product of the acceleration vector of the scattering frame and the heat flux.
Document ID
19890053017
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Webb, G. M.
(Arizona, University Tucson, United States)
Date Acquired
August 14, 2013
Publication Date
May 15, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 340
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A40388
Funding Number(s)
CONTRACT_GRANT: NSG-7101
CONTRACT_GRANT: NSF ATM-83-17701
Distribution Limits
Public
Copyright
Other

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