Extraordinary mode resonance cones in the Uranian magnetosphere?

Details Extraordinary mode resonance cones in the Uranian magnetosphere? Extraordinary mode resonance cones in the Uranian magnetosphere?

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9314309g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Dec. 1, 1988, p. 14309-14315.

Physics

2

Electrostatic Waves, Planetary Magnetospheres, Plasma Resonance, Uranus Atmosphere, Nonuniform Plasmas, Plasma Radiation, Voyager 2 Spacecraft, Waveforms

Scientific paper

A theory is introduced for previously unidentified waveforms involving decreasing frequency with time that were picked up in the Voyager 2 flyby of Uranus. They are identified as a possible band of extraordinary waves detected on resonance cone surfaces. Because of the resonance cone phenomenon, certain frequencies are only observed at certain angles from the source, and the frequency decreases as the angle decreases. The homogeneous plasma theory is shown to predict an almost linear drop in frequency with time. In principle one can use the wave frequency with time to estimate the distance and angle of the source for the homogeneous case. Inhomogeneities in the plasma are shown to produce a substantial variation on that and give the waveforms an important fine structure.

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