Physics
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.3289m&link_type=abstract
Journal of Geophysical Research, vol. 83, July 1, 1978, p. 3289-3298.
Physics
10
Alpha Particles, Particle Diffusion, Proton Flux Density, Solar Wind, Anisotropy, Graphs (Charts), Imp, Solar Activity
Scientific paper
The diffusive streaming of low-energy protons has been found to be predominately toward the sun during periods between prompt solar particle events. This occurs for essentially all solar wind velocities and proton intensities. The average radial component of this anisotropy (14%) and its dependence on the solar wind velocity agree with values found by a steady-state propagation model. The average radial component (16%) of the diffusive flow of low-energy alpha particles is similar to that observed for protons, suggesting a common origin. The sunward diffusion of alpha particles and protons indicates that these slightly enhanced fluxes contain a positive radial gradient. The direction of the diffusive anisotropy is a function of the magnetic field direction.
Marshall Francis E.
Stone Edward C.
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