The Venus ultraviolet aurora - A soft electron source

Details The Venus ultraviolet aurora - A soft electron source The Venus ultraviolet aurora - A soft electron source

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.9821f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, June 1, 1991, p. 9821-9828.

Other

14

Auroras, Planetary Radiation, Ultraviolet Spectra, Venus (Planet), Electron Precipitation, Energy Spectra, Ionospheric Ion Density, Oxygen Atoms, Pioneer Venus 1 Spacecraft

Scientific paper

The Pioneer Venus Orbiter Ultraviolet Spectrometer has recorded continuous but variable emissions of atomic oxygen at 1304 and 1356 A in images of the nightside of Venus. It is shown that the observed intensities are consistent with the presence of precipitation of soft electrons into the nightside thermosphere. Model calculations are presented in which upper and lower limits to the magnitude of the electron flux necessary to produce the observed intensities are derived. Constraints are imposed on the energy spectrum of the electrons by the measured ion densities and by the predicted intensities of other emissions that have not been detected.

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