Physics
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.1071d&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 11, p. 1071-1074
Physics
21
Dust, Electrons, Hypervelocity Impact, Jupiter (Planet), Radio Emission, Shoemaker-Levy 9 Comet, Synchrotron Radiation, Fragments, Jupiter Rings, Radiation Belts
Scientific paper
Solid material from comet Shoemaker-Levy 9 is expected to modify Jupiter's decimetric radio emission. Electrons passing through dust grains suffer a degradation in their energy, while larger sized material absorbs all electrons impinging on it. If there is enough dust and/or larger sized material in the magnetosphere, the effect on the energetic electrons can be observed via their synchrotron radiation, emitted at microwave frequencies. The planet's radio emission is expected to decrease, and the presence of dust induces a hardening in the radio spectrum. We expect the intensity to decrease immediately after cometary material enters the radiation belts; the radio emission continues to drop for many months as electrons diffuse inwards through a dusty magnetosphere. Radio observations of the planet during and after the cometary impact thus yield information on the amount of cometary material (optical depth of the dust and macroscopic material), impacts between cometary material and Jupiter's ring, and the diffusion process of energetic electrons through the magnetosphere.
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