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- Title
A New Ring Current Model for Saturn.
- Authors
Carbary, J. F.
- Abstract
The ring current of Saturn is obtained by taking the curl of the observed magnetic field. An analytical model of this ring current can then be obtained by fitting it to a lognormal in ρ and a Gaussian in z. Local time dependence is included as a harmonic expansion in ϕ for coefficients of the lognormal; radial dependence is included as a quadratic expansion in ρ of the width of the Gaussian. In this model, the ring current peaks at ~0.25 MA/RS2 at ~10 RS on the nightside near ~1 hr. The ring current strength minimizes at ~0.17 MA/RS2 on the dayside near ~16 hr. The cross‐sectional shape of the ring current is a teardrop extending from ~5 to ~20 RS or more. Key Points: Using the curl of the magnetic field obtained from Cassini data, the ring current of Saturn can be determined in three dimensionsAn analytical model of the ring current is constructed by fitting to a lognormal in range and a Gaussian in z, with the fit coefficients dependent on local timeRather than a block shape, the ring current has a tear drop cross‐sectional shape at all local times
- Subjects
RING currents; MAGNETOSPHERE of Saturn; MAGNETIC fields; GAUSSIAN processes; LOGNORMAL distribution
- Publication
Journal of Geophysical Research. Space Physics, 2019, Vol 124, Issue 5, p3378
- ISSN
2169-9380
- Publication type
Article
- DOI
10.1029/2019JA026560