Global Dynamics of Charged Dust Particles in Planetary Magnetospheres

Details Global Dynamics of Charged Dust Particles in Planetary Magnetospheres Global Dynamics of Charged Dust Particles in Planetary Magnetospheres

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phrvl..83.3993h&link_type=abstract

Physical Review Letters, Volume 83, Issue 20, November 15, 1999, pp.3993-3996

Physics

29

Scientific paper

We study the global stability of charged dust grains orbiting an axisymmetric planet. The corotating magnetic field and induced electric field are described in an inertial frame using the magnetic stream function and a two-dimensional effective potential Ue, parametrized by the conserved angular momentum pφ. Stable equilibria form the centers of complex potential wells, so that a particle which loses local stability can still be trapped globally. Applying the results to Saturn, we find that nonequatorial ``halo'' orbits are dominated by positively charged grains.

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