L-bursts in Jupiter's decametric radio spectra

Details L-bursts in Jupiter's decametric radio spectra L-bursts in Jupiter's decametric radio spectra

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..56..503r&link_type=abstract

Astrophysics and Space Science, vol. 56, no. 2, July 1978, p. 503-518. Research supported by the Academy of Finland.

Astronomy and Astrophysics

Astrophysics

9

Decametric Waves, Jupiter Atmosphere, Magnetic Storms, Planetary Radiation, Radio Bursts, Radio Spectra, Io, Jupiter (Planet), Occultation, Polarization Characteristics, Radio Frequencies, Upper Atmosphere, Jupiter, Radio Spectra, Spectrum, Radioemissions, Radio Bursts, Spectral Reflectivity, Io, Modulation, Polarized Radiation, Emission Envelopes, Observations, Occultations, L-Bursts, Decameter Waves

Scientific paper

Dynamic spectra of Jupiter's L-bursts are observed with high-resolution radio spectrographs. The L-bursts are characterized by their emission envelopes. The duration of envelopes varies from one to a few seconds increasing towards the opposition of Jupiter to reach a maximum in the vicinity of 10 to 20 d after opposition. Modulation lanes appear within the emission envelopes. The magnitude of the f-t slopes of lanes is determined by the central meridian longitude (CML) of Jupiter, and partly by the longitude of Io. The sign of the slopes depends on the CML only. The yearly averages for the f-t slopes do not seem to be related to the Jovicentric declination of the earth. Most lanes are relatively faint. A summary of the properties of modulation lanes is given. A peculiar case of polarization of an L-burst is shown. Certain 'shadow events' are interpreted as occultation effects caused by overdense meteor trails drifting in the upper atmosphere winds.

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