Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...150..139g&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 150, no. 1, Sept. 1985, p. 139-150.
Astronomy and Astrophysics
Astronomy
35
Decametric Waves, Io, Jupiter Atmosphere, Planetary Magnetospheres, Radio Astronomy, Gyrofrequency, Histograms, Magnetic Fields, Magnetohydrodynamic Waves, Northern Hemisphere, Voyager 1 Spacecraft, Voyager 2 Spacecraft, Jupiter, Emissions, Decameter Waves, Satellites, Io, Source, Orbits, Voyager Missions, Planetary Radio Astronomy Instrument, Pra, Frequencies, Comparisons, Spectra, Structure, Flux Tubes, Electrons, Acceleration, Magnetic Fields, Magnetic Effects, Alfven Waves, Velocity, Magnetosphere
Scientific paper
The high-frequency limit of the Jovian decameter (DAM) emission, obtained by Voyagers 1 and 2, is compared with the frequency at the foot of the field lines which intersect Io orbit, to test the hypothesis of a Jovian DAM source along the Io flux tube (IFT). An IFT-associated emission in the northern hemisphere was distinguished from the dominant Io-B and Io-AA'C emission component. In the southern hemisphere, the Io-D and Io-C sources corresponded with the instantaneous IFT. No Io-related diffuse emission was detected from the southern hemisphere at frequencies greater than 15 MHz. The role of the Alfven waves in the Io-related emissions is discussed. A discussion of the magnetic field model in the southern hemisphere on the basis of the analysis of the emission cone is presented.
Aubier M. G.
Genova Francoise
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