Other
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p43f..02j&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P43F-02
Other
[5421] Planetary Sciences: Solid Surface Planets / Interactions With Particles And Fields
Scientific paper
Most large outer planet moons orbit within the magnetospheres of their parent planets, and are continuously exposed to magnetospheric plasma. Depending on the competing effects on their surfaces of photoemission, which drives them positive, and incident plasma, which tends to impart a negative potential, outer planet satellites possess a range of surface potentials which can vary significantly as a function of local time and geographic location on each body. A review is presented of the theory and simulation of surface charging, as well as the recent direct detection through electron reflectometry of a negatively-charged surface at Saturn's moon, Rhea. The same processes also affect dust particles in planetary rings and other contexts such as the plumes of gas and solid particles originating at Enceladus's south polar region and the numerous volcanic vents on Io. The processes affecting these charged grains are also reviewed, as well as the resultant effects on dust trajectories, and dust populations' sometimes significant effects on the outer planet magnetospheres within which they reside.
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