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

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

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3414108a&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 14, CiteID L14108

Physics

10

Magnetospheric Physics: Planetary Magnetospheres (5443, 5737, 6033), Magnetospheric Physics: Plasma Waves And Instabilities (2471), Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Plasmasphere

Scientific paper

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.

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