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Magnetic signatures of plasma-depleted flux tubes in the Saturnian inner magnetosphere

Andre, N; Persoon, AM; Goldstein, J; Burch, JL; Louarn, P; Lewis, GR; Rymer, AM; ... Young, DT; + view all (2007) Magnetic signatures of plasma-depleted flux tubes in the Saturnian inner magnetosphere. Geophysical Research Letters , 34 (14) , Article L14108. 10.1029/2007GL030374. Green open access

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Abstract

Initial Cassini observations have revealed evidence for interchanging magnetic flux tubes in the inner Saturnian magnetosphere. Some of the reported flux tubes differ remarkably by their magnetic signatures, having a depressed or enhanced magnetic pressure relative to their surroundings. The ones with stronger fields have been interpreted previously as either outward moving mass-loaded or inward moving plasma-depleted flux tubes based on magnetometer observations only. We use detailed multi-instrumental observations of small and large density depletions in the inner Saturnian magnetosphere from Cassini Rev. A orbit that enable us to discriminate amongst the two previous and opposite interpretations. Our analysis undoubtedly confirms the similar nature of both types of reported interchanging magnetic flux tubes, which are plasma-depleted, whatever their magnetic signatures are. Their different magnetic signature is clearly an effect associated with latitude. These Saturnian plasma-depleted flux tubes ultimately may play a similar role as the Jovian ones.

Type: Article
Title: Magnetic signatures of plasma-depleted flux tubes in the Saturnian inner magnetosphere
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2007GL030374
Publisher version: http://dx.doi.org/10.1029/2007GL030374
Language: English
Additional information: Copyright 2007 by the American Geophysical Union
Keywords: Dynamics
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/81878
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