Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11c1762u&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM11C-1762
Physics
[2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [6280] Planetary Sciences: Solar System Objects / Saturnian Satellites, [6281] Planetary Sciences: Solar System Objects / Titan
Scientific paper
Recent papers by Bertucci et al. (2009), Rymer et al. (2009) and Simon et al. (2010) suggest the significant variability of conditions in Saturn’s magnetosphere at the orbit of Titan. Because of this variability, it was expected that models would generally have a difficult time regularly comparing to data from the Titan flybys (e.g. Simon et al. 2010). However, we find that in contrast to this expectation, it appears that there is underlying organization of the interaction features roughly above the exobase by the average external field due to Saturn’s dipole moment. Because this is the field that Titan itself is exposed to over long periods of time, it likely sets the boundary condition at the body itself. This produces interaction features observed in the magnetic field that are in basic agreement with a purely southward external field interaction with absorbing inner boundary conditions. Thus the basic features inferred from the Voyager 1 flyby seem to be generally present in spite of the ongoing external variations from SLT excursions, time variability and magnetospheric current systems as long as a significant southward external field component is present. Below the exobase, ionospheric effects and their associated currents complicate what is observed. Nevertheless, the basic impact of this result is that Titan is “preserving” in its interior the trace of Saturn’s’ dipole field which introduces order in the gross interaction appearance regardless of the external conditions variability.
Dougherty K. M. K. M.
Ledvina Stephen A.
Luhmann Janet G.
Ma Yi
Mandt Kathleen
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