Physics
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30f..22c&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 6, pp. 22-1, CiteID 1289, DOI 10.1029/2002GL015777
Physics
15
Magnetospheric Physics: Auroral Phenomena (2407), Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Mhd Waves And Instabilities, Magnetospheric Physics: Numerical Modeling
Scientific paper
In this report we examine the importance of ion and electron kinetic effects in the acceleration of electrons in small scale Alfven waves above the auroral oval. We implement a 1-D two-fluid MHD code approximating the effects of electron inertia and ion and electron temperatures to evaluate their role in accounting for the observed energies of field-aligned electron bursts found in coincidence with these waves above the auroral oval. FAST spacecraft data for a case study event characterized by large auroral ion energies and a hot plasma sheet is employed to define the plasma through which the wave propagates. It is found that strong kinetic effects at altitudes below 5 Earth radii may significantly reduce the amount of electron acceleration possible in the wave in terms of both energy and flux.
Bonnell J. W.
Carlson Carl W.
Chaston Christopher. C.
Ergun Robert E.
McFadden James P.
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