Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....8710401s&link_type=abstract
Journal of Geophysical Research, vol. 87, Dec. 1, 1982, p. 10401-10406.
Astronomy and Astrophysics
Astronomy
7
Astronomical Models, Decametric Waves, Electron Beams, Jupiter (Planet), Magnetospheric Ion Density, Planetary Radiation, Radio Bursts, Current Density, Electron Acceleration, Flux (Rate), Magnetic Field Configurations, Planetary Magnetospheres
Scientific paper
Jovian S bursts that are V shaped in the frequency-time domain have been reported by several observers. These can arise if an outward moving about 2.5-keV electron beam in the Io flux tube is longitudinally modulated in velocity by about keV peak to peak, at a frequency of several hertz. Such modulation near the ionosphere could also explain the difference between the maximum observed frequencies of S burst and L burst emission. In order for this beam to produce the observed total S burst flux, a large part of the approximately five million A current observed in the Io flux tube must participate. In this case the observed duration of individual S bursts is consistent with magnetospheric ion densities greater than about 15/cu cm. This ballistic model for S bursts also suggests an interpretation for the origin of L burst emission.
Rosenkranz P. W.
Staelin David H.
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