Proton temperature anisotropy instabilities in the solar wind

Details Proton temperature anisotropy instabilities in the solar wind Proton temperature anisotropy instabilities in the solar wind

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.1241g&link_type=abstract

Journal of Geophysical Research, vol. 81, Mar. 1, 1976, p. 1241-1246. ERDA-sponsored research.

Physics

28

Anisotropy, Magnetohydrodynamic Stability, Proton Energy, Solar Protons, Solar Wind Velocity, Wave Dispersion, Cosmic Plasma, Cyclotron Frequency, Ion Cyclotron Radiation, Plasma Temperature, Proton Density (Concentration), Proton Resonance, Vlasov Equations

Scientific paper

The nature of plasma instabilities in the solar wind at 1 AU is studied. The linear dispersion properties of proton temperature anisotropy are investigated, taking the proton distribution to consist of two components, a cooler 'core' and a hotter 'halo'. Of the four plasma instabilities studied (fire-hose, mirror, ion cyclotron, Harris), the fire-hose and the ion cyclotron instabilities are shown to be the most important modes for the parameters considered. Resonant proton effects enhance both instabilities and the cooler component can significantly reduce the threshold anisotropy of the halo-driven fire-hose.

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