Nature of the turbulence observed by ISEE 1-2 during a quasi-perpendicular crossing of the earth's bow shock

Details Nature of the turbulence observed by ISEE 1-2 during a quasi-perpendicular crossing of the earth's bow shock Nature of the turbulence observed by ISEE 1-2 during a quasi-perpendicular crossing of the earth's bow shock

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..489l&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 8, July-Aug. 1990, p. 489-502. Research supported by CNES.

Physics

18

Bow Waves, Electron Density (Concentration), Geomagnetism, International Sun Earth Explorers, Magnetohydrodynamic Turbulence, Shock Fronts, High Resolution, Linear Polarization, Magnetohydrodynamic Flow

Scientific paper

High-resolution profiles of the electron density Ne and of the magnetic field B are analyzed for a quasi-perpendicular supercritical crossing of the earth's bow shock for which the upstream beta is slightly larger than 1. In a low-frequency range, relevant to the two-fluid MHD approximation, and in a high-frequency range around the downstream proton gyrofrequency f(cid), the magnetic polarization and the correlation between Ne and the component of the magnetic field parallel to the average field are studied. A clear anticorrelation between Ne and B(parallel) is found in the downstream part of the overshoot.

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