HR: 10:30h
AN: SM12A-01 INVITED     [Abstracts]
TI: No, Yes, and Most of the Time
AU: * Hill, T W
EM: hill@rice.edu
AF: Physics and Astronomy Department, Rice University MS 108, Houston, TX 77005 United States
AB: Those are my answers to the questions raised in the session title. Saturn's magnetosphere is not Earth-like because, although affected by solar wind properties, it is not dynamically driven by solar-wind coupling. It is Jupiter-like in that both are powered by planetary rotation. In both cases, rotational energy is extracted from the planet by dominantly internal sources of plasma that serves to populate the magnetosphere as well as tap the rotational energy reservoir. The number, location, and even the nature of the internal plasma sources are quite different at Saturn than Jupiter but, when these differences are taken into account, there is every reason to expect that the same basic physical paradigm will apply. I will touch on the confirming evidence already provided by Cassini during its first few orbits, and on outstanding questions that we hope to address in the remainder of the mission. The third question is somewhat of a trick question, as I will explain.
DE: 5443 Magnetospheres (2756)
SC: SPA-Magnetospheric Physics [SM]
MN: 2005 Joint Assembly