Particle Tracing Studies of the Mass Loading of the Io Torus

Details Particle Tracing Studies of the Mass Loading of the Io Torus Particle Tracing Studies of the Mass Loading of the Io Torus

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p21b0375c&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #P21B-0375

Physics

5780 Tori And Exospheres, 6218 Jovian Satellites

Scientific paper

Mass loading of the Io torus by sulfur dioxide and sulfur monoxide ions leads to the generation of ion cyclotron waves at the gyrofrequency of the ions, powered by the free energy in the "ring beam" produced in the pickup process. The region in which these waves are observed is spatially limited, resulting in rapid changes in amplitude, as observed by the Galileo spacecraft during its passes by Io. The location of the boundaries potentially can tell us about the source regions for the ions. We perform forward calculations of ion trajectories varying source location and plasma flow characteristics to determine what controls these boundaries and where each species originates. Sodium monoxide associated waves appear over a greater region around Io than sodium dioxide waves, and even though the sodium dioxide emissions may dominate when they appear, the source region of sulfur monoxide ions appears to have greater longitudinal extent than that of sulfur dioxide.

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