Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p53c..03b&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #P53C-03
Physics
[5440] Planetary Sciences: Solid Surface Planets / Magnetic Fields And Magnetism, [5443] Planetary Sciences: Solid Surface Planets / Magnetospheres, [5724] Planetary Sciences: Fluid Planets / Interiors, [6275] Planetary Sciences: Solar System Objects / Saturn
Scientific paper
Since the Pioneer and Voyager era, Saturn’s internal planetary magnetic field has been known to be highly axisymmetric. Unlike Jupiter, whose rotation rate is determined by its dipole tilt, the symmetry of Saturn’s magnetic field has precluded its use to determine the planetary rotation period. Despite this symmetry, magnetospheric phenomena are consistently observed at periods close to the presumed planetary rotation rate. Various periods have been proposed to represent the rotation rate of the deep interior such as 10 hours 32 minutes 35 seconds, based on a minimization of wind-induced dynamic heights in the atmosphere [Anderson and Schubert, 2007] and 10 hours 34 minutes 13 seconds based on an analysis of potential vorticity [Read et al., 2009]. Without knowledge of Saturn’s rotation rate it is impossible to derive an accurate model of the planetary magnetic field that includes any non-axisymmetric components yet the existence of those components has been difficult to measure. In this analysis we use generalized inversion techniques to detect Saturn’s non-axisymmetric internal magnetic field for likely planetary rotation periods. We have determined a range of planetary rotation periods for which the non-axisymmetric internal field is enhanced and which is likely to represent the rotation rate of the deep interior. This rotation rate forms the basis for a model we derive of Saturn’s internal magnetic field.
Burton Marcia E.
Dougherty K. M. K. M.
Russell Chris
No associations
LandOfFree
Saturn’s Rotation Rate as Determined from its Nonaxisymmetric Magnetic Field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Saturn’s Rotation Rate as Determined from its Nonaxisymmetric Magnetic Field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Saturn’s Rotation Rate as Determined from its Nonaxisymmetric Magnetic Field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1774611