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3D global multi-species Hall-MHD simulation of the Cassini T9 flyby

Ma, YJ; Nagy, AF; Toth, G; Cravens, TE; Russell, CT; Gombosi, TI; Wahlund, JE; ... Neubauer, FM; + view all (2007) 3D global multi-species Hall-MHD simulation of the Cassini T9 flyby. Geophysical Research Letters , 34 (24) , Article L24S10. 10.1029/2007GL031627. Green open access

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Abstract

The wake region of Titan is an important component of Titan's interaction with its surrounding plasma and therefore a thorough understanding of its formation and structure is of primary interest. The Cassini spacecraft passed through the distant downstream region of Titan on 18: 59: 30 UT Dec. 26, 2005, which is referred to as the T9 flyby and provided a great opportunity to test our understanding of the highly dynamic wake region. In this paper we compare the observational data (from the magnetometer, plasma analyzer and Langmuir probe) with numerical results using a 7-species Hall MHD Titan model. There is a good agreement between the observed and modeled parameters, given the uncertainties in plasma measurements and the approximations inherent in the Hall MHD model. Our simulation results also show that Hall MHD model results fit the observations better than the non-Hall MHD model for the flyby, consistent with the importance of kinetic effects in the Titan interaction. Based on the model results, we also identify various regions near Titan where Hall MHD models are applicable.

Type: Article
Title: 3D global multi-species Hall-MHD simulation of the Cassini T9 flyby
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2007GL031627
Publisher version: http://dx.doi.org/10.1029/2007GL031627
Language: English
Additional information: Copyright 2007 by the American Geophysical Union
Keywords: Plasma spectrometer, Titans ionosphere, Hybrid simulation, Magnetosphere, Voyager-1, Flow
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/140844
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