Physics – Plasma Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm11b1578n&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM11B-1578
Physics
Plasma Physics
[2740] Magnetospheric Physics / Magnetospheric Configuration And Dynamics, [2753] Magnetospheric Physics / Numerical Modeling, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions, [7800] Space Plasma Physics
Scientific paper
Interaction between the solar wind and the mini-magnetosphere of dipolar magnetized objects is investigated by a three-dimensional hybrid simulation, which treats the ions as kinetic super particles via particle-in-cell method and the electrons as a massless fluid. The study is important for not only understanding of the physical interaction processes for magnetized asteroids but also evaluation of the magnetic sail propulsion that uses an artificial dipole magnetic field to deflect the solar wind. A physical parameter characterizing the magnetosphere is a distance ahead of the magnetized object where the magnetic field pressure balances the solar wind ram pressure. If the distance is much smaller than the ion Larmor radius, the interaction is very weak and the solar wind is hardly deflected. On the other hand, if the distance becomes much larger, it will approach an earth-like magnetosphere. When the distance is the order of the ion Larmor radius, the ion kinetic effects become much important for the formation and structure of the mini-magnetosphere. We develop a three-dimensional hybrid simulation code and investigate the formation and structure of the mini-magnetosphere for the various magnitudes and inclinations of the magnetic dipole and its influence of the momentum transfer from the solar wind to the magnetized object.
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