Theoretical model of Saturn's kilometric radiation spectrum

Details Theoretical model of Saturn's kilometric radiation spectrum Theoretical model of Saturn's kilometric radiation spectrum

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.8739g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, July 1, 1989, p. 8739-8755.

Astronomy and Astrophysics

Astronomy

38

Kilometric Waves, Planetary Radiation, Radio Sources (Astronomy), Saturn (Planet), Atmospheric Models, Electric Fields, High Energy Electrons, Magnetic Dipoles, Planetary Magnetic Fields, Saturn, Theoretical Studies, Models, Kilometer Waves, Radiation, Spectra, Magnetic Fields, Emissions, Intensity, Electric Fields, Plasma, Density, Parameters, Diagrams, Calculations, Saturation, Flux Tubes, Source, Origin, Trapping

Scientific paper

A model was developed, which allowed the theoretical derivation of an envelope for the average spectrum of the Saturnian kilometric radiation (SKR), assuming that the SKR is generated by the cyclotron maser instability. The theoretical SKR spectrum derived was found to exhibit the same spectral features as the observed mean spectra. Namely, the overall shape of both calculated and measured spectra are similar, with the fluxes peaking at frequencies of 100,000 Hz and decreasing abruptly at high frequencies, and more slowly at lower frequencies. The calculated spectral intensity levels exceed the most intense observed intensities by up to 1 order of magnitude, suggesting that the SKR emission is only marginally saturated by nonlinear processes.

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