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Magnetic field fossilization and tail reconfiguration in Titan's plasma environment during a magnetopause passage: 3D adaptive hybrid code simulations

Müller, J. und Simon, S. und Motschmann, U. und Glassmeier, K.-H. und Sauer, J. und Schüle, J. und Pringle, G. J. (2010) Magnetic field fossilization and tail reconfiguration in Titan's plasma environment during a magnetopause passage: 3D adaptive hybrid code simulations. Planetary and Space Science, 58 (12), Seiten 1526-1546. Elsevier. DOI: DOI: 10.1016/j.pss.2010.07.018.

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Kurzfassung

We present a hybrid simulation study (kinetic ions, fluid electrons) of Titan's plasma interaction during an excursion of this moon from Saturn's magnetosphere into its magnetosheath, as observed for the first time during Cassini's T32 flyby on 13 June 2007. In contrast to earlier simulations of Titan's plasma environment under non-stationary upstream conditions, our model considers a difference in the flow directions of magnetospheric and magnetosheath plasma. Two complementary scenarios are investigated, with the flow directions of the impinging magnetospheric/magnetosheath plasmas being (A) antiparallel and (B) parallel. In both cases, our simulations show that due to the drastically reduced convection speed in the slow and dense heavy ion plasma near Titan, the satellite carries a bundle of “fossilized” magnetic field lines from the magnetosphere in the magnetosheath. Furthermore, the passage through Saturn's magnetopause goes along with a disruption of Titan's pick-up tail. Although the tail is not detached from the satellite, large clouds of heavy ion plasma are stripped of its outer flank, featuring a wave-like pattern. Whereas in case (B) under parallel flow conditions there is only a small retardation of about 5 min between the passage of Titan through the magnetopause and the reconfiguration of the pick-up tail, the tail reconfiguration in the case (A) scenario is completed not until 25 min after the magnetopause passage. The lifetime of fossil fields in the moon's ionosphere is approximately 25 min, regardless of whether parallel or antiparallel flow conditions are applied.

Dokumentart:Zeitschriftenbeitrag
Titel:Magnetic field fossilization and tail reconfiguration in Titan's plasma environment during a magnetopause passage: 3D adaptive hybrid code simulations
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Müller, J.Institute for theoretical Physics, TU Braunschweig, Germany
Simon, S.Institut of Geophysics and Meteorology, University of colongne, Germany
Motschmann, U.Institute for theoretical Physics, TU Braunschweig, Germany
Glassmeier, K.-H.Institute for Geophysics and Extraterrestrial Physics, TU Braunschschweig, Germany
Sauer, J. Institut of Geophysics and Meteorology, University of colongne, Germany
Schüle, J.Gauss-IT-Centre, TU Braunschweig, Germany
Pringle, G. J. EPCC, University of Edinburgh, UK
Datum:2010
Erschienen in:Planetary and Space Science
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:58
DOI :DOI: 10.1016/j.pss.2010.07.018
Seitenbereich:Seiten 1526-1546
Verlag:Elsevier
Name der Reihe:Elsevier
Status:veröffentlicht
Stichwörter:Titan, Fossil magnetic fields, Plasma interactions with unmagnetized, bodies, Cassini, Real-time simulations
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Asteroiden und Kometen (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Asteroiden und Kometen
Hinterlegt von: Laura-Maria Brumm
Hinterlegt am:14 Jan 2011 14:56
Letzte Änderung:26 Mär 2013 13:26

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