Cosmic-ray streaming in the Born approximation

Details Cosmic-ray streaming in the Born approximation Cosmic-ray streaming in the Born approximation

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348..597b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 348, Jan. 10, 1990, p. 597-607. Research supported by NASA.

Astronomy and Astrophysics

Astrophysics

30

Born Approximation, Cosmic Rays, Diffusion Coefficient, Particle Acceleration, Diffuse Radiation, Fokker-Planck Equation, Solar Radiation

Scientific paper

The present work invokes the Born approximation to derive a more accurate expression for the streaming of cosmic rays parallel to the mean magnetic field. While all prior results pertaining to the helicity dependence of the diffusion coefficient and convection speed can be recovered as special cases from this streaming equation, it is concluded that a new set of transport parameters presented here is more appropriate for the solar modulation of galactic cosmic rays. In addition, a new parameter related to time variability, which may be a dominant cause of charge sign-dependent transport of solar particles, is introduced.

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