Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm31d..05h&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM31D-05
Physics
[2740] Magnetospheric Physics / Magnetospheric Configuration And Dynamics, [2753] Magnetospheric Physics / Numerical Modeling, [2756] Magnetospheric Physics / Planetary Magnetospheres, [6275] Planetary Sciences: Solar System Objects / Saturn
Scientific paper
A series of more than 20 global MHD simulations of Saturn’s magnetosphere has been used to the study the configuration, convection, plasma loss mechanisms and plasmoid formation as a function of the solar wind dynamic pressure, IMF and axial tilt. We will present results which demonstrate that the magnetosphere behaves quite differently under high and low dynamic pressures, with high pressures resulting in a non-dynamically varying magnetosphere, medium pressures resulting in periodic plasmoid events and very low pressures resulting in a chaotic release of plasma. In cases where a plasmoid is released we find that the plasmoid results from helical reconnection across the midnight-dawn sector of the tail to form a flux rope which is initially connected to both the northern and southern ionospheres. We will explore this topology in more detail and in addition we will present results about the mass of the plasmoids as well as the size, mass, X-line length and volume of the magnetosphere.
de Zeeuw D.
Gombosi Tamas I.
Hansen Kenneth Calvin
Jia Xun
Zieger Bertalan
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