Voyager and Nancay observations of the Jovian radio-emission at different frequencies - Solar wind effect and source extent

Details Voyager and Nancay observations of the Jovian radio-emission at different frequencies - Solar wind effect and source extent Voyager and Nancay observations of the Jovian radio-emission at different frequencies - Solar wind effect and source extent

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...182..159g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 182, no. 1, Aug. 1987, p. 159-162.

Astronomy and Astrophysics

Astronomy

22

Jupiter (Planet), Radio Emission, Solar Wind, Voyager Project, Io, Planetary Magnetospheres, Jupiter, Spacecraft Observations, Voyager Missions, Radio Waves, Origin, Emissions, Frequencies, Solar Wind, Decameter Waves, Source, Latitude, Magnetosphere, Earth-Based Observations, Hectometer Waves, Analysis, Intensity, Astronomy, Comparisons, Radiation, Satellites, Io

Scientific paper

Voyager observations of the Jovian radio emission at hectometer- and decameter-wavelengths are well correlated. On the other hand, the probability of observing Io-independent Jovian decametric emission from Nançay is shown to be highly variable. These variations correspond well to fluctuations of hectometric activity, influenced by the solar wind, observed by Voyager. This implies that the hectometric and non-Io decametric events originate from the same source regions, at high latitudes in the Jovian magnetosphere, and that the altitude extent of the source covers several planetary radii, like the source of Saturn kilometric radiation. No effect is found for the Io-dependent emission, which is consistent with a source close to the Io field line. Spacecraft low-frequency and ground-based high frequency observations of the Jovian radio-emission are thus shown to be complementary.

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