Other
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.296...20c&link_type=abstract
Nature, vol. 296, Mar. 4, 1982, p. 20.
Other
1
Magnetohydrodynamic Flow, Planetary Ionospheres, Plasma Interactions, Shock Fronts, Solar Wind, Venus Atmosphere, Magnetic Field Configurations, Magnetic Flux, Photoionization, Pioneer Venus Spacecraft, Venus, Diagrams, Solar Wind, Interactions, Plasmas, Magnetic Fields, Magnetic Properties, Magnetotail, Comparisons, Acceleration, Oxygen, Gravity Fields, Geometry, Regions, Ionosphere, Models, Flux Ropes, Formation, Waves
Scientific paper
The physics of the interaction of the supermagnetosonic magnetized solar wind plasma with the unmagnetized, highly conductive ionosphere of Venus is discussed. While the basic characteristics of the interaction are known to comprise the formation of a bow shock in front of the planet which heats, slows and deflects the flow around the ionosphere, perturbations of this picture are not well understood. Interesting plasma effects seen in the distant magnetotail include regions of solar wind plasma depletion and the pickup of ionospheric oxygen ions, which probably originate from charge exchange and photoionization of the hot neutral oxygen exosphere above the ionosphere. Other unexpected phenomena revealed by Pioneer Venus include plasma clouds apparently detached from the ionosphere in the terminator region ionospheric holes accompanied by radial magnetic field in the midnight sector and magnetic flux ropes in the dayside ionosphere, which may result from induced convection driven by the solar wind interaction.
Cloutier Paul A.
Russell Christopher T.
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