Moon-Ionosphere Coupling

Details Moon-Ionosphere Coupling Moon-Ionosphere Coupling

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsm43d..05k&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SM43D-05

Physics

2732 Magnetosphere Interactions With Satellites And Rings, 2756 Planetary Magnetospheres (5443, 5737, 6030), 5737 Magnetospheres (2756)

Scientific paper

Data acquired by Galileo in its glorious tour of the Jovian magnetosphere, supplemented by the auroral images acquired by the Hubble Space Telescope, provide the foundation for increasingly detailed and sophisticated descriptions of the perturbations of the magnetospheric plasma as a result of its interaction with a good-sized moon. Many aspects of the interaction had been anticipated before the close flybys occurred, but perhaps not all of the early work on the subject had been fully digested. We now know much more about the disturbances launched from the moon into the jovian ionosphere but we are still wringing our hands over the evidence that strong coupling to the ionosphere extends along the orbits of the moons far into the downstream region. The development of field-aligned electric fields coupling the moons to the planet has been upgraded from speculative to probable following multiple observations of narrowly beamed relativistic electrons on passes by Io. Questions remain as to how energy from equatorial regions reaches the auroral ionosphere of Jupiter despite the strong reflection of Alfvén waves from field-aligned density gradients. Although this matter is not fully understood, some interesting ideas have been proposed and will be discussed.

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