Interaction of S- and L-bursts in Jupiter's decametric radio spectra

Details Interaction of S- and L-bursts in Jupiter's decametric radio spectra Interaction of S- and L-bursts in Jupiter's decametric radio spectra

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981m%26p....25..373r&link_type=abstract

Moon and the Planets, vol. 25, Dec. 1981, p. 373-387.

Astronomy and Astrophysics

Astronomy

16

Decametric Waves, Electromagnetic Interactions, Jupiter (Planet), Planetary Radiation, Radio Bursts, Radio Sources (Astronomy), Emission Spectra, Io, Spectral Line Width, Superhigh Frequencies, Ultrahigh Frequencies

Scientific paper

Dynamic spectra of Jupiter's decametric emission are observed with a high-resolution radio spectrograph. Certain events observed in region Io-B display interaction effects between the S- and L-emissions. The effect appears as a gap in the L-emission after a passage of an S-burst. In a typical case the L-emission has a relatively narrow bandwidth, the S-burst appears as a sloping line crossing it, and the duration of the emission gap is a substantial fraction of a second. The gap has sharp, sloped edges; its leading edge has an f-t slope which is the same as that of the S-burst while the slope of the trailing edge is lower. A kind of 'tilted V-pattern' is thus formed. It is suggested that some more complicated spectral patterns may also be produced this way. It seems that an emission model consisting of S-bursts from bunches of gyrofrequency-emitting electrons ascending a flux tube and interacting with L-emitting bunches of electrons having more stationary guiding centers is inadequate to explain the complex S-L interactions.

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