Dust in planetary magnetospheres

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Scientific paper

Dust particles immersed in the magnetized plasma environment of planetary magnetospheres collect electrostatic charges. The expected charges are modest and only micron and smaller grains will be significantly perturbed by the resulting electrodynamic forces. These electrodynamic perturbations compete with other processes - radiation pressure, plasma and exospheric drag, etc. - and for micron (and smaller) grains result in energy and angular momentum exchange with the magnetospheric fields that dominate the orbital evolution of these small grains. The presence of dust also modifies the plasma environment. Sputtering, photo and secondary emissions, etc. are processes that couple the spatial and temporal evolution of the dust and the plasma. The study of this magnetospheric dusty plasma complex involves a large number of possible space experiments.

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