Physics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9613763c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Aug. 1, 1991, p. 13,763-13,779.
Physics
23
Magnetic Field Configurations, Magnetohydrodynamic Stability, Magnetopause, Shock Discontinuity, Solar Terrestrial Interactions, Solar Wind, Computerized Simulation, Electron Pressure, Ion Distribution, Neutral Sheets, Plasma-Electromagnetic Interaction
Scientific paper
Tangential discontinuities (TDs) in space plasmas are examined analytically emphasizing the temporal evolution of the phenomena from an initial state. A hybrid numerical simulation code is employed which treats the electrons as a massless fluid and the ions as particles. Density ratios, the plasma beta on the magnetosheath side, and the value of the electric potential difference across the TD are found to be the significant determinants of TD structure, whereas the orientation of the magnetic fields on the sides of the TD are not significant. TD structure is dependent on the assumed initial conditions; for example, TD evolution is inhibited when the initial width exceeds the width of a TD evolved from an infinitesimally thin initial TD. Plasma microinstabilities leading to relaxation are theorized to be possible since the currents in the TD layer can approach the ion thermal speed.
Cargill Peter J.
Eastman Timothy E.
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