Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm11d..02t&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SM11D-02
Physics
2708 Current Systems (2409), 2740 Magnetospheric Configuration And Dynamics, 2756 Planetary Magnetospheres (5443, 5737, 6030), 2764 Plasma Sheet
Scientific paper
We have used magnetic field data from the magnetometer instrument(MAG) onboard Galileo to build a new model of the current sheet of Jupiter's magnetosphere. We identified 3,330 plasma sheet crossings from the MAG data obtained from all 33 Galileo orbits as well as the Voyager 1 and 2, Pioneer 10 and Ulysses spacecraft to develop this model. We account for the delay of the current sheet both in terms of the bend-back of the magnetic field lines and the delay caused by wave travel time effects. The hinging of the current sheet caused by the influence of solar wind forcing and centrifugal force effects is also included. These effects are seen to be functions of local time as well as radial distance from Jupiter. The bend back, which results in a delay in the prime longitude of the neutral current sheet, appears to be strongest on the dawn side and weakest on the dusk side. We next model the thickness of the current sheet by using the Harris neutral sheet equations. The best fits show that the thickness varies both as a function of local time and radial distance. A comparison of the model with the observations is provided.
Galland Kivelson Margaret
Khurana Krishan K.
Taylor Donald J.
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