Pulsating aurorae - Evidence for flux limiting

Details Pulsating aurorae - Evidence for flux limiting Pulsating aurorae - Evidence for flux limiting

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..185d&link_type=abstract

Geophysical Research Letters, vol. 7, Mar. 1980, p. 185-188. Research supported by the Lockheed Independent Research Program.

Physics

2

Auroras, Electron Capture, Electron Precipitation, Flux (Rate), Alaska, Electron Distribution, Electronic Spectra, Mathematical Models, Spectrophotometry, Trapped Particles, Very Low Frequencies, Wave Interaction

Scientific paper

The paper reports the results of recent spectrophotometric observations of pulsating auroras, and shows that they are consistent with the theory of flux limiting. Photometric observations made at the Chatanika, Alaska optical site are related to the total energy deposit and to the mean energy parameter of the precipitating electron flux. The precipitating electron flux is modeled by the method of Rees and Luckey (1974) as a Maxwellian energy distribution. The well-developed pulsations are caused mainly by a modulation of the mean energy parameter. A nearly constant 'limiting' value for the precipitating flux is measured (700 million el/sq cm) from which a trapped flux limit of approximately 3 billion el/sq cm sec can be inferred.

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