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Embedded Kinetic Simulation of Ganymede's Magnetosphere: Improvements and Inferences
Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA..
Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA..
Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA..
Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA..ORCID iD: 0000-0001-7288-2805
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2019 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 124, no 7, p. 5441-5460Article in journal (Refereed) Published
Abstract [en]

The largest moon in the solar system, Ganymede, is also the only moon known to possess a strong intrinsic magnetic field and a corresponding magnetosphere. Using the new version of Hall magnetohydrodynamic with embedded particle-in-cell model with a self-consistently coupled resistive body representing the electrical properties of the moon's interior, improved inner boundary conditions, and the flexibility of coupling different grid geometries, we achieve better match of magnetic field with measurements for all six Galileo flybys. The G2 flyby comparisons of plasma bulk flow velocities with the Galileo Plasma Subsystem data support the oxygen ion assumption inside Ganymede's magnetosphere. Crescent shape, nongyrotropic, and nonisotropic ion distributions are identified from the coupled model. Furthermore, we have derived the energy fluxes associated with the upstream magnetopause reconnection of similar to 10(-7) W/cm(2) based on our model results and found a maximum of 40% contribution to the total peak auroral emissions.

Place, publisher, year, edition, pages
AMER GEOPHYSICAL UNION , 2019. Vol. 124, no 7, p. 5441-5460
Keywords [en]
Ganymede, simulation, magnetosphere, reconnection, COSTER RJ, 1979, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, V84, P5099 syliunas VM, 2000, GEOPHYSICAL RESEARCH LETTERS, V27, P1347 a Xianzhe, 2008, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, V113
National Category
Geophysics
Identifiers
URN: urn:nbn:se:kth:diva-259461DOI: 10.1029/2019JA026643ISI: 000482985600033Scopus ID: 2-s2.0-85069678381OAI: oai:DiVA.org:kth-259461DiVA, id: diva2:1352895
Note

QC 20190920

Available from: 2019-09-20 Created: 2019-09-20 Last updated: 2019-09-20Bibliographically approved

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Markidis, Stefano

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