Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30...29b&link_type=abstract
Planetary and Space Science, vol. 30, Jan. 1982, p. 29-37.
Astronomy and Astrophysics
Astronomy
91
Ionospheric Electron Density, Plasma Clouds, Space Exploration, Space Plasmas, Venus Atmosphere, Venus Clouds, Escape Velocity, Ion Motion, Ion Sheaths, Pioneer Venus 1 Spacecraft, Planetary Ionospheres, Spaceborne Astronomy, Venus, Plasmas, Clouds, Ionopause, Pioneer Venus, Oetp, Features, Electron Temperature Probe, Solar Wind, Ionosphere, Interactions, Flows, Morphology, Distribution, Origin, Formation, Source, Ionosheath, Ions, Structure, Electrons, Density, Analysis, Escape, Flux, Diffusion, Dayside, A
Scientific paper
The global distribution of the plasma clouds observed by the Pioneer Venus Orbiter suggest that they originate at the dayside ionopause as wavelike structures which may become detached and swept downstream in the ionosheath flow. Alternatively, the clouds may actually be attached streamers analogous to cometary structure. Estimates of the total ion escape rate from Venus by this process yields values up to 7 x 10 to the 26th ions/s. Preliminary analysis shows that such an escape flux could be supplied by the upward diffusion limited flow of O(+) from the entire dayside ionosphere. If such an escape flux were to continue over the entire lifetime of Venus, the effects upon the evolution of the primitive atmosphere may have been significant.
Brace Larry H.
Hoegy Walter R.
Theis Robert F.
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