Other
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.4697m&link_type=abstract
Journal of Geophysical Research, vol. 86, June 1, 1981, p. 4697-4707.
Other
18
Cold Plasmas, Kelvin-Helmholtz Instability, Magnetohydrodynamic Flow, Magnetohydrodynamic Stability, Magnetopause, Shear Flow, Space Plasmas, Density Distribution, Distribution Functions, Electrostatic Waves, Flow Velocity, High Temperature Plasmas, Ion Acoustic Waves, Magnetohydrodynamic Waves, Maxwell Equation, Plasma Density, Vlasov Equations
Scientific paper
The results are presented of a detailed study that examines the effects of cold plasma on the Kelvin-Helmholtz instability. Both electrostatic and electromagnetic modes are considered. The interest in the Kelvin-Helmholtz instability stems from observations of low frequency waves in the polar cusp, magnetopause, in fast moving auroral forms, the plasma pause, and other regions of magnetospheric flow boundaries. It is pointed out that the Kelvin-Helmholtz instability is driven by a velocity shear and can excite a broad spectrum of wave frequencies below the ion gyrofrequency. A model is obtained of a flow boundary that includes a density gradient perpendicular to the velocity shear. The analysis shows a compressional component in Kelvin-Helmholtz waves.
Melander B. G.
Parks George K.
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