Energy flux and characteristic energy of an elemental auroral structure

Details Energy flux and characteristic energy of an elemental auroral structure Energy flux and characteristic energy of an elemental auroral structure

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2789l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 25, p. 2789-2792

Physics

12

Atmospheric Models, Auroral Arcs, Earth Atmosphere, Electron Density Profiles, Electron Precipitation, Satellite Observation, Density Measurement, Eiscat Radar System (Europe), Normal Density Functions, Photometry

Scientific paper

Electron density profiles acquired with the EISCAT radar at 0.2 s time resolution, together with TV images and photometric intensities, were used to study the characteristics of thin (less than 1 km) auroral arc structures that drifted through the field of view of the instruments. It is demonstrated that both high time and space resolution are essential for deriving the input parameters of the electron flux responsible for the elemental auroral structures. One such structure required a 400 mW/sq m (erg/sq cm s) downward energy flux carried by an 8 keV monochromatic electron flux equivalent to a current density of 50 micro Angstrom/sq m.

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