Callisto plasma interactions: Hybrid modeling including induction by a subsurface ocean
2015 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 120, no 6, 4877-4889 p.Article in journal (Refereed) Published
By using a hybrid plasma solver (ions as particles and electrons as a fluid), we have modeled the interaction between Callisto and Jupiter's magnetosphere for variable ambient plasma parameters. We compared the results with the magnetometer data from flybys (C3, C9, and C10) by the Galileo spacecraft. Modeling the interaction between Callisto and Jupiter's magnetosphere is important to establish the origin of the magnetic field perturbations observed by Galileo and thought to be related to a subsurface ocean. Using typical upstream magnetospheric plasma parameters and a magnetic dipole corresponding to the inductive response inside the moon, we show that the model results agree well with observations for the C3 and C9 flybys, but agrees poorly with the C10 flyby close to Callisto. The study does support the existence of a subsurface ocean at Callisto.
Place, publisher, year, edition, pages
2015. Vol. 120, no 6, 4877-4889 p.
Callisto, plasma interaction, hybrid model, subsurface ocean, Galileo flyby, magnetosphere
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:umu:diva-107178DOI: 10.1002/2015JA021212ISI: 000358199100059OAI: oai:DiVA.org:umu-107178DiVA: diva2:850430