The average magnetic field draping and consistent plasma properties of the Venus magnetotail

Details The average magnetic field draping and consistent plasma properties of the Venus magnetotail The average magnetic field draping and consistent plasma properties of the Venus magnetotail

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.7939m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, July 1, 1986, p. 7939-7953. Navy-DOE-sponsored research.

Physics

56

Magnetic Field Configurations, Planetary Magnetic Fields, Space Plasmas, Current Density, Current Sheets, Plasma Density, Plasma Temperature

Scientific paper

A new technique has been developed to determine the average structure of the Venus magnetotail (in the range from -8 RV to -12 RV) from the Pioneer Venus magnetometer observations. The spacecraft position with respect to the cross-tail current sheet is determined from an observed relationship between the field-draping angle and the magnitude of the field referenced to its value in the nearby magnetosheath. This allows the authors statistically to remove the effects of tail flapping and variability of draping for the first time and thus to map the average field configuration in the Venus tail. From this average configuration they calculate the cross-tail current density distribution and J×B forces. Continuity of the tangential electric field is utilized to determine the average variations of the X-directed velocity. From the calculated J×B forces, plasma velocity, and MHD momentum equation the approximate plasma acceleration, density, and temperature in the Venus tail are determined.

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