Physics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3311101l&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 11, CiteID L11101
Physics
25
Magnetospheric Physics: Magnetosphere Interactions With Satellites And Rings, Planetary Sciences: Fluid Planets: Rings And Dust, Planetary Sciences: Fluid Planets: Tidal Forces, Planetary Sciences: Solar System Objects: Saturnian Satellites
Scientific paper
The magnetometer onboard the Cassini spacecraft observes ion cyclotron waves produced by both water-group (O+, OH+, H2O+, or H3O+) and O2+ ions at nearly all radial distances and local times within the E ring. These left-hand elliptically polarized waves travel at small angles to the magnetic field and are restricted to near the equatorial plane, where they have their peak amplitudes. They are generated by pickup ions created by the ionization of the neutral exosphere surrounding the E-ring material, and their subsequent acceleration by the electric field associated with the corotating plasma. The energy flux of these waves is proportional to the energy added to the ions when they are accelerated and enables an estimate of the rate of loss of the ring's exosphere.
Bertucci Cesar
Blanco-Cano Xochitl
Dougherty K. M. K. M.
Leisner Jared S.
Russell Christopher T.
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