Physics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..299d&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 12, May 1985, p. 299-302.
Physics
26
Gas Giant Planets, Planetary Magnetic Fields, Rotation, Cold Plasmas, Io, Jupiter (Planet), Kilometric Waves, Saturn Atmosphere, Solar Magnetic Field, Planets, Rotation, Magnetic Fields, Giant Planets, Spin, Structure, Latitude, Comparisons, Magnetosphere, Jupiter, Periodicity, Saturn, Surface, Features, Uranus, Neptune, Dynamo Theory
Scientific paper
The author argues that, with regard to the spin rate of magnetic field structure as a function of latitude, the behavior of the magnetic fields of gaseous planets is more analogous to the Sun than the Earth. Certain Jovian magnetospheric phenomena differ in repetition period by 3%. In order to explain Jupiter's two distinct periodicities, it is hypothesized that the spin period of the planet's magnetic features is a function of both latitude and the size of the feature, with smaller high-latitude features rotating slower than either low-latitude features or the dominant dipole moment. Similarly, the low-latitude planetary spin period of Saturn is shorter than the presently accepted single value because the present value is based on a high-latitude magnetic phenomenon.
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