Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm21b1894k&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM21B-1894
Physics
[2744] Magnetospheric Physics / Magnetotail, [2753] Magnetospheric Physics / Numerical Modeling, [2764] Magnetospheric Physics / Plasma Sheet, [6275] Planetary Sciences: Solar System Objects / Saturn
Scientific paper
Cassini has observed a handful of plasmoids in Saturn's magnetotail and will likely observe more when its future orbits move it out of the equatorial plane. While Cassini's orbits are unfavorably positioned to observe the dynamic nature of Saturn's crosstail current sheet, our new multi-scale/multi-fluid model of the Kronian system allows for a global view with high resolution gridding in the magnetotail, to capture small-scale size dynamics associated with plasmoid development. The multi-scale nature of the model enables us to resolve structures whose sizes are similar to or less than the grid length of previous simulations, and how these structures affect the rest of the simulation, as they develop and travel into the lower resolution simulation regions. Measurements from the Cassini spacecraft are one dimensional, making it difficult to determine the location of reconnection sites as well as the speed and composition of plasmoid structures. Results are validated against Cassini observations and show a crosstail current sheet, bent up into a bowl shape, as well as quantitative information regarding current sheet thickness, kinking, flapping, hinging location, and tilt angle.
Harnett Erika M.
Kidder A.
Paty Carol S.
Winglee Robert
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