Physics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.4221l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, May 1, 1985, p. 4221-4227.
Physics
8
Auroral Electrojets, Electrical Resistivity, Electron Precipitation, Explorer 54 Satellite, Particle Acceleration, Electron Distribution, Energy Spectra, Velocity Distribution
Scientific paper
Electron fluxes measured with high time resolution by AE-D during narrow bursts of intense electron precipitation fluxes within inverted-V events are compared with electron distributions obtained from particle simulations based on an anomalous resistivity model. The qualitative agreement between the AE-D observations and the computer simulations is excellent. When the potential energy is small, both the AE-D observations and the simulations indicate strongly field-aligned electron beams; both also agree that the accelerated electrons undergo large pitch angle scattering when the potential drop increases above a certain critical value. Furthermore, the simulations show that electron distributions are isotropized progressively from low to high energy, in agreement with the AE-D observation that the electron flux isotropization occurred first at lower energies. These results suggest that anomalous resistivity may play an important role in the acceleration of auroral particles.
Lin Chang-Shou
Rowland H. L.
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