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The moon and the planets

, Volume 25, Issue 4, pp 373–387 | Cite as

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

  • Jorma J. Riihimaa
  • Thomas D. Carr
Article

Abstract

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 anf-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.

Keywords

Interaction Effect Typical Case Flux Tube Substantial Fraction Leading Edge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Co. 1981

Authors and Affiliations

  • Jorma J. Riihimaa
    • 1
    • 2
  • Thomas D. Carr
    • 1
  1. 1.Department of AstronomyUniversity of FloridaGainesvilleUSA
  2. 2.Aarne Karjalainen ObservatoryUniversity of OuluFinland

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