The magnetic field of Neptune

Details The magnetic field of Neptune The magnetic field of Neptune

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12..239c&link_type=abstract

(Planetary magnetospheric physics II; Proceedings of Symposium 5 and the Topical Meetings of the Interdisciplinary Scientific Co

Physics

8

Neptune (Planet), Planetary Magnetic Fields, Spherical Harmonics, Voyager 2 Spacecraft, Dynamo Theory, Flyby Missions, Interplanetary Trajectories, Lines Of Force, Magnetic Dipoles, Multipolar Fields

Scientific paper

A model is given of the planetary magnetic field of Neptune based on a spherical harmonic analysis of the observations obtained by the Voyager 2. Generalized inverse techniques are used to partially solve a severely underdetermined inverse problem, and the resulting model is nonunique since the observations are limited in spatial distribution. Dipole, quadrupole, and octupole coefficients are estimated independently of other terms, and the parameters are shown to be well constrained by the measurement data. The large-scale features of the magnetic field including dipole tilt, offset, and harmonic content are found to characterize a magnetic field that is similar to that of Uranus. The traits of Neptune's magnetic field are theorized to relate to the 'ice' interior of the planet, and the dynamo-field generation reflects this poorly conducting planet.

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