Observations of auroral electron inverted-V structures by the Aureol-3 satellite

Details Observations of auroral electron inverted-V structures by the Aureol-3 satellite Observations of auroral electron inverted-V structures by the Aureol-3 satellite

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34..255b&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, March 1986, p. 255-257, 259-269.

Physics

33

Auroras, Electron Precipitation, Current Density, Electric Potential, Electron Acceleration, Electron Energy, Field Aligned Currents, Ionospheric Currents, Latitude

Scientific paper

A detailed statistical study is presented of the distribution of the inverted-V electron precipitation commonly detected in the 500-2000-km altitude range aboard the Aureol-3 satellite. These structured precipitations are statistically observed inside the auroral oval with a maximum occurrence in the evening-midnight sector. They correspond to primary electron fluxes peaked at energies generally below 10 keV and precipitating in large-scale structures (50-100 km in latitudinal width). It is shown that, as predicted by collisionless kinetic theories, most inverted-V structures present a clear relationship between the field-aligned current density carried by the 1-20 keV primary electrons and the potential drop inferred from particle distribution functions. Furthermore, the study demonstrates the existence of strong electron heating inside the acceleration region.

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