Topology of Saturn's main magnetic field

Details Topology of Saturn's main magnetic field Topology of Saturn's main magnetic field

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.292..721a&link_type=abstract

Nature, vol. 292, Aug. 20, 1981, p. 721-724.

Astronomy and Astrophysics

Astronomy

18

Astronomical Models, Planetary Magnetic Fields, Planetary Magnetospheres, Ring Currents, Saturn (Planet), Dipole Moments, Flyby Missions, Helium, Hydrogen, Planetary Structure, Topology, Voyager 1 Spacecraft, Saturn, Magnetic Fields, Voyager 1, Magnetosphere, Models, Data, Dipole, Dipole Moment, Atmosphere, Helium, Gravity Effects, Conduction, Analysis, Convection, Characteristics, Emissions, Pioneer 11, Comparisons, Observations

Scientific paper

The reported analysis of Saturn's main magnetic field takes into account the data obtained by Voyager 1 during its close flyby of Saturn in November 1980. A magnetic field model for the analysis of Saturn's main field in which the distributed ring currents are explicitly modelled is constructed. The considered internal field parameters constitute a first approximation to Saturn's main field. Several model current systems that might be expected on physical grounds to be active in Saturn's magnetosphere are considered. It is pointed out that certain aspects of Saturn's main magnetic field relevant to the planet's interior have been discussed by Stevenson (1980). In particular, the unexpectedly small dipole moment seems to be consistent with the gravitational settling of helium, which leads to a much smaller electrically conducting and convecting region than would be expected of a homogeneous distribution of hydrogen and helium.

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