Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pazh....5..478g&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 5, Sept. 1979, p. 478-481.) Soviet Astronomy Letters, vol. 5, Sept.-Oct. 1979, p. 257,
Astronomy and Astrophysics
Astronomy
2
Decametric Waves, Jupiter (Planet), Planetary Radiation, Plasma Sheaths, Radio Bursts, Magnetohydrodynamic Stability, Planetary Magnetic Fields, Synchrotron Radiation
Scientific paper
A model for the generation of the S-bursts of Jovian decametric radiation by the emission of electrons from the plasma sheath of Io as a result of plasma synchrotron instability is analyzed. Nonlinear estimates of the level of saturation of the instability in the cases of beam and empty loss cone subrelativistic electron distributions are used to obtain estimates of total radiant power in a given frequency interval. The intensity of electromagnetic waves generated by a beam of subrelativistic electrons is shown to be in reasonable agreement with those observed in the S-bursts, while the cone-type instability may produce the less intense wideband continuum background. The synchrotron instability growth rate is also found to be higher than that of the cyclotron instability, and to produce an ordinary electromagnetic wave of a lower frequency.
Galeev A. A.
Krasnoselskikh Vladimir
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