Plasma properties of driver gas following interplanetary shocks observed by ISEE-3

Details Plasma properties of driver gas following interplanetary shocks observed by ISEE-3 Plasma properties of driver gas following interplanetary shocks observed by ISEE-3

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983nascp.2280.711z&link_type=abstract

In JPL Solar Wind Five p 711-717 (SEE N84-13067 03-92)

Computer Science

23

Interplanetary Medium, Magnetic Fields, Magnetohydrodynamic Flow, Shock Wave Propagation, Solar Wind, Helium, Hydrodynamic Equations, Hydrogen, Plasma Dynamics, Satellite Observation

Scientific paper

Plasma fluid parameters calculated from solar wind and magnetic field data to determine the characteristic properties of driver gas following a select subset of interplanetary shocks were studied. Of 54 shocks observed from August 1978 to February 1980, 9 contained a well defined driver gas that was clearly identifiable by a discontinuous decrease in the average proton temperature. While helium enhancements were present downstream of the shock in all 9 of these events, only about half of them contained simultaneous changes in the two quantities. Simultaneous with the drop in proton temperature the helium and electron temperature decreased abruptly. In some cases the proton temperature depression was accompanied by a moderate increase in magnetic field magnitude with an unusually low variance, by a small decrease in the variance of the bulk velocity, and by an increase in the ratio of parallel to perpendicular temperature. The cold driver gas usually displayed a bidirectional flow of suprathermal solar wind electrons at higher energies.

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