Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm23a0299l&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SM23A-0299
Physics
2732 Magnetosphere Interactions With Satellites And Rings, 2756 Planetary Magnetospheres (5443, 5737, 6033), 5706 Aurorae, 5737 Magnetospheres (2756), 7836 Mhd Waves And Instabilities (2149, 2752, 6050)
Scientific paper
The description of Alfvén waves propagating in the Io plasma torus has often been considered in the WKB approximation, considering only the Alfvén travel time and possible reflection at the boundaries of the torus. However, for waves that have scale lengths comparable to the scale height of the torus, this procedure will break down and a full wave solution must be considered. Using plasma parameters based on Voyager and Galileo data, we have determined eigenmodes of Alfvén waves propagating in the torus and coupled to Jupiter's ionosphere, and determined the Green's function as a function of frequency for waves excited when Io is at different latitudinal positions within the torus due to the inclination of Io's orbit with respect to the centrifugal equator. This calculation serves as input for a three-dimensional simulation of the propagation of these Alfvén waves. This model may give insight as to the structure of the aurora trailing the footpoint of the Io flux tube.
Bagenal Fran
Delamere Peter
Lysak Robert L.
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