Evidence for the E x B drift of pulsating auroras

Details Evidence for the E x B drift of pulsating auroras Evidence for the E x B drift of pulsating auroras

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7983s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Oct. 1, 1983, p. 7983-7988.

Computer Science

Sound

19

Auroras, Electron Precipitation, High Energy Electrons, Ionospheric Drift, Plasma Drift, Plasma-Electromagnetic Interaction, E Region, Imaging Techniques, Ionospheric Sounding, Lorentz Force, Plasma Diagnostics, Pulsed Radiation, Television Systems

Scientific paper

Simultaneous measurements of ionospheric electric fields by STARE and TV imaging of pulsating auroral forms strongly suggest that the latter undergo E x B drift. A display of pulsating auroras is considered as the projection on the ionosphere of an assembly of ducts of enhanced plasma density convecting with the background plasma. Energetic electrons, convecting and with additional gradient and curvature drift, sweep through these ducts which are 'illuminated' by pulsating precipitation of these energetic electrons. Both the self-sustained pulsation model of Davidson (1979) and the driven pulsation model of Coroniti and Kennel (1970) are compatible with our observations.

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