Evidence for beaming of Jupiter's decametric radiation - Simultaneous observations from Voyagers and ground-based observatories

Details Evidence for beaming of Jupiter's decametric radiation - Simultaneous observations from Voyagers and ground-based observatories Evidence for beaming of Jupiter's decametric radiation - Simultaneous observations from Voyagers and ground-based observatories

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987repm.work.....m&link_type=abstract

Universitaet Graz and Oesterreichische Akademie der Wissenschaften, International Workshop on Radio Emissions from Planetary Mag

Statistics

Decametric Waves, Jupiter (Planet), Planetary Radiation, Space Observations (From Earth), Voyager Project, Corotation, Io, Magnetospheres, Voyager 1 Spacecraft, Voyager 2 Spacecraft

Scientific paper

The paper presents incontrovertible evidence for the beaming of the Jovian decametric radiation, based on simultaneous observations at about 22 MHz from one or both of the Voyager spacecraft and one or the other of two ground-based observatories. The data are used to test the hollow-cone beaming models that have been proposed to account both for the long-term statistics of the ground-based observations and for the arc structures discovered in the dynamic spectral plots of Voyager data. It is concluded that occurrences of non-Io-related Source A events are determined by the corotation with the inner Jovian magnetosphere of curved-sheet beams, and those of Io-related Source B storms by a similar type of beam that moves with the northern foot of the Io flux tube. Both types of beam can be approximated by hollow-cone beam sectors. Rough measurements of the observed portions of some of the beams have been made.

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