Physics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusm.p44a..01k&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #P44A-01
Physics
5443 Magnetospheres (2756), 2740 Magnetospheric Configuration And Dynamics, 2756 Planetary Magnetospheres (5443, 5737, 6033), 2764 Plasma Sheet
Scientific paper
Cassini continues to provide exciting new observations from the magnetosphere of Saturn. These observations are helping us understand the structure and dynamics of Saturn's magnetosphere. The observations are also helping us construct a versatile new model of Saturn's magnetospheric field for use in future data analysis. Our model consists of modules which specify (1) the internal spherical harmonic field, (2) the ring current and the magnetotail current system, (3) the field from the radial current system which reinforces corotation on the outflowing plasma. (4) the shielding fields from an axially symmetric but hinged magnetopause and (5) the interconnection magnetic field from the solar wind IMF. In our new model, Saturn's current sheet field is based on Tsyganenko and Peredo [1994] models of disk- shaped current sheets. The shielding field from the magnetopause for the equatorial current sheet and the internal field is specified by Cartesian and cylindrical harmonics, respectively. To derive the shielding fields we use a new model of the magnetopause [Arridge et al. (2006) submitted] constructed from magnetopause crossings observed by both Cassini and Voyager. We next introduce the tilt, and hinging of the current sheet by using the general deformation technique [Tsyganenko, 1998]. The model uses observations from Pioneer, Voyager and Cassini. A comparison of model field with the observations will be presented.
Arridge Christopher S.
Dougherty K. M. K. M.
Khurana Krishan K.
Schwarzl H.
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