Statistics – Computation
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.4704f&link_type=abstract
Journal of Geophysical Research, vol. 82, Oct. 1, 1977, p. 4704-4710. NSF-supported research.
Statistics
Computation
2
Diffusion Theory, Interplanetary Space, Particle Diffusion, Solar Atmosphere, Solar Cosmic Rays, Solar Flares, Anisotropy, Approximation, Astronomical Models, Diffusion Coefficient, Particle Density (Concentration), Solar Activity Effects
Scientific paper
The paper presents a theoretical study of the propagation of solar cosmic rays after release from a flare, diffusive motion around the sun and in interplanetary space being assumed. Approximate analytic solutions have been found for the density and anisotropy of the cosmic rays for the case of two-dimensional diffusion around the sun. Both density and anisotropy are found to be prolonged at 1 AU relative to those for impulsive injection; by combining these, the diffusion coefficients at the sun and at 1 AU are extracted separately. Numerical computations over a wide range of propagation conditions are used to check the approximate analytic solution, and the solution is applied to the solar flare event of September 1, 1971.
Ford Tim
Palmer I. D.
Sanders Richard
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