Steady-state plasma transition in the Venus ionosheath

Details Steady-state plasma transition in the Venus ionosheath Steady-state plasma transition in the Venus ionosheath

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..131p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Feb. 1991, p. 131-134. Research supported by CONACYT.

Physics

10

Bow Waves, Planetary Ionospheres, Plasma Dynamics, Plasma Sheaths, Venus Atmosphere, Electric Fields, Pioneer Venus 1 Spacecraft, Plasma Density, Solar Wind, Steady State, Venus, Ionosphere, Ionosheath, Plasma, Electric Field, Pvo Mission, Spacecraft Observations, Downstream, Oetp Instrument, Diagrams, Velocity, Trajectory, Magnetic Effects, Solar Wind, Geometry, Temperature, Density, Flow, Wakes, Location (Position)

Scientific paper

The results of an extended analysis of the plasma and electric field data of the Pioneer Venus Orbiter (PVO) are presented. The persistent presence of a plasma transition embedded in the flanks of the Venus ionosheath between the bow shock and the ionopause is reported. This transition is identified by the repeated presence of characteristic bursts in the 30 kHz channel of the electric field detector of the PVO. The observed electric field signals coincide with the onset of different plasma conditions in the inner ionosheath where more rarified plasma fluxes are measured. The repeated identification of this intermediate ionosheath transition in the PVO data indicates that it is present as a steady state feature of the Venus plasma environment. The distribution of PVO orbits in which the transition is observed suggests that it is more favorably detected in the vicinity of and downstream from the terminator.

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