?
Interpretation of the harmonic structure of Jupiter radiation in the decameter wave range
The harmonic structure of the dynamic spectrum of Jupiter’s decameter radio emission observed
during a noise storm on November 12, 2012, by the Uran-2 radio telescope (Poltava, Ukraine) is interpreted
based on the effect of double plasma resonance with ion-cyclotron harmonics. According to the proposed
model, ion-cyclotron waves are effectively generated at frequencies close to the frequency of the lower hybrid
resonance in the upper ionosphere of Jupiter, in those regions of source elongation along the magnetic field
lines, where the condition of double plasma resonance is satisfied. Extraordinary electromagnetic radiation
arises due to the scattering of cyclotron waves by streams of suprathermal electrons. Comparison of the theoretical
emission spectrum and the observed dynamic spectrum gives estimates of the plasma distribution in
the generation region and the source coordinates.