Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986iowa.reptr....k&link_type=abstract
Progress Report Iowa Univ., Iowa City. Dept. of Physics and Astronomy.
Astronomy and Astrophysics
Astronomy
Electromagnetic Radiation, Jupiter Atmosphere, Modulated Continuous Radiation, Periodic Variations, Radio Sources (Astronomy), Radio Waves, Electrons, Flux (Rate), Jupiter (Planet), Planetary Magnetospheres
Scientific paper
An analysis of periodic variations in the amplitude of continuum radiation near 3 kHz trapped in the Jovian magnetosphere shows structure with periods near both 5 and 10 horus. Contrary to a plausible initial idea, the continuum amplitudes are not organized by the position of the observer relative to the dense plasma sheet. Instead, there seem to be perferred orientations of system III longitude with respect to the direction to the sun which account for the peaks. This implies a clocklike modulation of the continuum radiation intensity as opposed to a searchlight effect. The importance of the dipole longitude solar wind alignment to the amplitude of the continuum radiation implies that the source region of the radiation is near the magnetopause and may indirectly tie the generation of the radio waves to the clocklike modulation of energetic electron fluxes from Jupiter.
Gurnett Donald A.
Kurth Willaim S.
Scarf Frederick L.
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