Computer Science
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....4813k&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #4813
Computer Science
Scientific paper
We present a new model of Jupiter's magnetospheric field, which has been derived from the observations of all the six spacecraft that have traveled through Jupiter's magnetosphere. The model incorporates an internal spherical harmonic model (VIP4), a new module for ring and magnetotail currents and shielding fields from an axially symmetric magnetopause. The structure and thickness of Jupiter's equatorial current sheet is described by a new structural model that incorporates the delay and hinging of the current sheet at large distances. The thickness of the current sheet is modeled as a sinusoidal function of local time such that the current sheet is at its thinnest in the dawn sector and is the thickest in the dusk sector. The model also correctly includes the effect of the 3.2 degrees tilt between the Jovian orbital plane and the solar equatorial plane. To model the magnetic field of Jupiter's current sheet we use analytical models of disk-shaped current sheets similar to those advanced by Tsyganenko and Peredo [1994] for the Earth's current sheet. These models use an axially symmetric representation of the magnetic vector potential of a ring current to provide simple expressions for the calculation of magnetic field. Next, we use a general deformation technique [Tsyganenko, 1998] to introduce delay and hinging effects on the magnetic field of the Jovian current sheet. Finally, we use Cartesian and cylindrical harmonics to specify the shielding field for the equatorial current sheet and the internal field, respectively. We will present a comparison of the model with observations from various local times in Jupiter's magnetosphere.
Khurana Krishan K.
Tsyganenko Nikolai A.
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