Interpenetrating solar wind streams

Details Interpenetrating solar wind streams Interpenetrating solar wind streams

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974rvgsp..12..715f&link_type=abstract

Reviews of Geophysics and Space Physics, vol. 12, Nov. 1974, p. 715-723. AEC-sponsored research.

Physics

Space Physics

18

Ion Distribution, Ion Temperature, Nonuniform Plasmas, Proton Energy, Solar Wind Velocity, Velocity Distribution, Alpha Particles, Astronomical Models, Plasma Spectra, Radial Velocity, Solar Corona

Scientific paper

Observations of solar wind interpenetrating ion streams are reviewed. They occur preferentially during periods of low but increasing plasma number density and most likely result from spatial and/or temporal inhomogeneities in the solar wind bulk velocity. The exact nature of these inhomogeneities is not known, but three conceptual models that account for the observations are summarized. Double ion streams are shown to occur during extended time periods during which the proton anisotropy and dimensionless heat flux undergo large coherent variations. This fact provides strong evidence that a major source for solar wind internal ion energy is its bulk convection energy. The observed continuum of proton velocity configurations further suggests that the ion internal energy state at 1 AU is often perturbed by bulk flow spatial and/or temporal inhomogeneities.

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