A signature of auroral precipitation in the nightside ionosphere of Venus

Details A signature of auroral precipitation in the nightside ionosphere of Venus A signature of auroral precipitation in the nightside ionosphere of Venus

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1625f&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Sept. 1990, p. 1625-1628.

Physics

13

Auroral Ionization, Ion Density (Concentration), Oxygen Ions, Planetary Ionospheres, Venus (Planet), Electron Precipitation, Ion Production Rates, Thermosphere

Scientific paper

It is shown that the densities of mass-28 ions measured by the Pioneer Venus Orbiter ion mass spectrometer (OIMS) on the nightside of Venus are highly variable and show little correlation with the values of the O(+) densities. The total production rates of mass-28 ions in the chemical equilibrium region are determined and it is found that this production rate cannot be explained by known chemical production reactions. It is proposed that the 'excess' production is due to precipitation of electrons into the nightside thermosphere.

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