Absorption of whistler mode waves in the ionosphere of Venus

Details Absorption of whistler mode waves in the ionosphere of Venus Absorption of whistler mode waves in the ionosphere of Venus

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...205..112t&link_type=abstract

Science, vol. 205, July 6, 1979, p. 112-114.

Physics

4

Electromagnetic Absorption, Ionospheric Propagation, Landau Damping, Pioneer Venus Spacecraft, Planetary Ionospheres, Venus Atmosphere, Whistlers, Ionospheric Electron Density, Lightning, Particle Size Distribution, Propagation Modes, Venus, Probes, Ionosphere, Pioneer Venus, Whistler, Waves, Dayside, Heating, Electrons, Nightside, Brightness

Scientific paper

It is shown that whistler mode waves from the ionosheath of Venus are absorbed by Landau damping at the dayside ionosphere boundary. This process heats the ionospheric electrons and it may provide an important energy input into the dayside ionosphere. Cyclotron damping of the waves does not occur in the same region. However, Landau damping of ionosheath waves is apparently not an important energy source in the nightside ionosphere. Impulsive events in the nightside ionosphere seem to fall into two classes: (1) lightning signals (near periapsis) and (2) noise, which may be caused by gradient or current instabilities.

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