Energetic Particle Interactions in the Vicinity of Io

Details Energetic Particle Interactions in the Vicinity of Io Energetic Particle Interactions in the Vicinity of Io

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsm43d..01t&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SM43D-01

Physics

2720 Energetic Particles, Trapped, 2722 Forecasting, 2736 Magnetosphere/Ionosphere Interactions, 2756 Planetary Magnetospheres (5443, 5737, 6030)

Scientific paper

Changes in the distribution of energetic particles measured by the Galileo Energetic Particle Detector in the vicinity of Io can be used to model the global distribution of magnetic and electric fields in the vicinity of the moon. Some changes are simply caused by an adiabatic response of the particles as they are carried past Io by the co-rotational flow. There is also evidence for non-adiabatic scattering processes, which allow entry of particles to regions inaccessible by direct flow. The presence of narrow field-aligned electron beams in the wake region behind Io and also across the polar caps of the moon requires a strong acceleration source close to the footpoint of the magnetic flux tube in the Jovian upper atmosphere. We suggest that this is a result of current flow between Io and the atmosphere, as a consequence of the differential rotation rates.

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