Low frequency radio emissions from Jupiter - Jovian kilometric radiation

Details Low frequency radio emissions from Jupiter - Jovian kilometric radiation Low frequency radio emissions from Jupiter - Jovian kilometric radiation

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979georl...6..747k&link_type=abstract

Geophysical Research Letters, vol. 6, Sept. 1979, p. 747-750.

Physics

6

Jupiter (Planet), Low Frequencies, Planetary Radiation, Radio Emission, Radio Spectra, Background Radiation, Bandwidth, Emission Spectra, Graphs (Charts), Isotropic Media, Plasma Probes, Radiant Flux Density, Spectral Bands, Spectrograms, Time Functions, Voyager 1 Spacecraft, Voyager 2 Spacecraft, Jupiter, Kilometer Waves, Radioemissions, Toruses, Radiation, Voyager 1, Voyager 2, Storms, Bursts, Spectroscopy, Isotopes, Characteristics, Io, Plasma Wave Instrument, Wavelengths, Electromagnetic Waves, Spectrum

Scientific paper

A new component of the Jovian radio spectrum has been observed by the plasma wave instruments on Voyager 1 and 2 at frequencies ranging from about 10 to 56 kHz or higher. This Jovian kilometric radiation is characterized by storms of emissions lasting typically 45 minutes at 56.2 kHz, however some events persist for as long as four hours. The storms usually exhibit impulsive bursts with time scales of a few seconds to several minutes, although some events show smoothly varying intensities as a function of time. High resolution frequency-time spectrograms reveal a continuum-like background with more intense, narrowband features superimposed. The narrowband, or discrete, features tend to decrease in frequency with increasing time, falling about 1 kHz in 5 to 60 seconds. The maximum power emitted assuming an isotropic radiator near Jupiter and a bandwidth for the most intense bursts of about 10 kHz is about 10 to the 19th watts. The Jovian kilometric radiation is most likely observed within + or - 45 deg of 200 deg System III longitude, lambda III, although there is a secondary maximum near lambda III = 25 deg.

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