Physics
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33..147r&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 33, Feb. 1985, p. 147-157.
Physics
3
Anisotropy, Corotation, Solar Corpuscular Radiation, Solar Wind, International Sun Earth Explorer 3, Interplanetary Magnetic Fields, Shock Waves, Solar Protons, Solar Wind Velocity
Scientific paper
The anisotropy of 35-1000 keV ions in two corotating particle events associated with high-speed solar wind streams at 1 AU is examined in terms of the diffusion-convection propagation model using data from the Energetic Proton Anisotropy Spectrometer on ISEE-3. The calculated diffusive anisotropy in the solar wind frame is found to be sunward and closely field-aligned, with a nearly energy-independent magnitude of about 40 percent. For one stream, using the Voyager 2 data of Decker et al. (1981), a positive gradient of about 100 percent/AU is found for greater than or equal to 50 keV ions between 1 and 4 AU. The observations do not appear to support the scatter-free propagation model and indicate that ions with energies as low as a few tens of keV may be in diffusive equilibrium with the solar wind in this class of events.
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