Computer Science – Sound
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.8700c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Aug. 1, 1987, p. 8700-8706. Navy-DNA-supported research.
Computer Science
Sound
19
Auroral Electrojets, E Region, Ionospheric Currents, Magnetohydrodynamic Stability, Space Plasmas, Collisional Plasmas, Ion Acoustic Waves, Particle Motion
Scientific paper
The effects of a field-aligned electron drift on the development of two-stream plasma instabilities which may have applications to the auroral electrojet are considered. It is found that the inclusion of a parallel drift modifies the threshold criteria for the onset of the Farley-Buneman instability and may cause excitation of oblique ion sound waves. However, the phase velocity of the linearly excited waves remains greater than or equal to the local ion acoustic velocity. These results are applied to an auroral E region, and it is shown that they may explain some observations of auroral irregularities, for example, the observation of irregularities which are not highly field aligned and the observation of ion acoustic wavelike irregularities for ambient electric fields below the critical value.
Chaturvedi P. K.
Fedder Joel A.
Huba Joseph D.
Ossakow S. L.
Satyanarayana P.
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