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Medicean Moons Sailing Through Plasma Seas: Challenges in Establishing Magnetic Properties

Published online by Cambridge University Press:  03 November 2010

Margaret G. Kivelson
Affiliation:
Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095-1567, USA email: [email protected] Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109-2143
Xianzhe Jia
Affiliation:
Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109-2143
Krishan K. Khurana
Affiliation:
Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095-1567, USA email: [email protected]
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Abstract

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Jupiter's moons, embedded in the magnetized, flowing plasma of Jupiter's magnetosphere, the plasma seas of the title, are fluids whose highly non-linear interactions imply complex behavior. In a plasma, magnetic fields couple widely separated regions; consequently plasma interactions are exceptionally sensitive to boundary conditions (often ill-specified). Perturbation fields arising from plasma currents greatly limit our ability to establish more than the dominant internal magnetic field of a moon. With a focus on Ganymede and a nod to Io, this paper discusses the complexity of plasma-moon interactions, explains how computer simulations have helped characterize the system and presents improved fits to Ganymede's internal field.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2010

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