HR: 17:36h
AN: SM24A-07    [Abstracts]
TI: Application of a linear gyrofluid model to the Jupiter-Io interaction
AU: * Su, Y
EM: ysu@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AU: Ergun, R E
EM: Robert.Ergun@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AU: Bagenal, F
EM: Fran.Bagenal@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AU: Jones, S T
EM: sjones@lepvax.gsfc.nasa.gov
AF: Universities Space Research Association, NASA/GSFC, code 692, Greenbelt, MD 20771 United States
AU: Parker, S E
EM: sparker@colorado.edu
AF: The Center for Integrated Plasma Studies, University of Colorado, UCB 390, Boulder, CO 80309 United States
AU: Delamere, P A
EM: Peter.Delamere@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AB: One of the most interesting of the Jovian auroral processes is highly sporadic radio emissions from Jupiter's magnetosphere that extend from 10 kHz to 33 MHz while most of the powerful decametric emissions observed between 15 and 27 MHz occur within two ranges of Central Meridian Longitude (CML). The duration of these pulses varies from 200 ms to 1 ms, hence, they referred to as S-bursts. An Alfv$\acute e$n eigenmode, called the ionospheric Alfv$\acute e$n resonator, can develop between the conducting boundary of Jupiter and the exponential increase in Alfv$\acute e$n velocity on the topside of ionosphere. A Vlasov code is used to provide density profiles along the Jupiter-Io flux tube while a gyrofluid model will be used to study the propagation of Alfv$\acute e$n waves. With this effort, we are attempting to examine whether the Alfv$\acute e$n resonator in Jupiter's ionosphere may be associated with the periodicity of S-bursts. Alfv$\acute e$nic fluctuations may be partially (or mostly) reflected by the large density gradient near Io's torus. We will calculate the percentage of the wave power that reaches high latitudes of Jupiter through the use of our gyrofluid code.
DE: 7827 Kinetic and MHD theory
DE: 7843 Numerical simulation studies
DE: 6220 Jupiter
DE: 2451 Particle acceleration
DE: 2704 Auroral phenomena (2407)
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting