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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 ,
Xianzhe Jia  and
Krishan K. Khurana
Margaret G. Kivelson
Affiliation:
Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095-1567, USA email: mkivelson@igpp.ucla.edu 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: mkivelson@igpp.ucla.edu
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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.

Keywords

Galilean moonsmagnetic fieldmagnetosphere
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S269: Galileo's Medicean Moons: their impact on 400 years of discovery , January 2010 , pp. 58 - 70
Copyright
Copyright © International Astronomical Union 2010

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