Grott, M. and Sohl, F. and Hussmann, H. (2007) Degree-one convection and the origin of Enceladus’ dichotomy. In: 4th International Meeting of the Asia Oceania Geosciences Society, PS11-A0011. 4th International Meeting of the Asia Oceania Geosciences Society (AOGS), 2007-07-30 - 2007-08-04, Bangkok, Thailand.
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Abstract
Recently, the Cassini spacecraft has detected ongoing geologic activity near the south pole of Saturn’s moon Enceladus. In contrast, its north-polar region is heavily cratered and appears to have been geologically inactive for a long time. We propose that this hemispheric dichotomy is caused by the satellite’s interior dynamics and that a degree-one convection pattern is driving the south-polar activity. We investigate a number of core sizes and internal heating rates for which degreeone convection occurs. The numerical simulations imply that a core radius of less than 120 km and an energy input at a rate of 3.0 to 5.5 GW would be required for degree-one convection to prevail. This is within the range of the observed thermal power release near Enceladus’ south pole. Provided that Enceladus is not fully differentiated, degree-one convection is found to be a viable mechanism to explain Enceladus’ hemispheric dichotomy.
Item URL in elib: | https://elib.dlr.de/50906/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | Degree-one convection and the origin of Enceladus’ dichotomy | ||||||||||||
Authors: |
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Date: | July 2007 | ||||||||||||
Journal or Publication Title: | 4th International Meeting of the Asia Oceania Geosciences Society | ||||||||||||
Refereed publication: | No | ||||||||||||
Open Access: | No | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | No | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Page Range: | PS11-A0011 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | convection, Enceladus, icy moons | ||||||||||||
Event Title: | 4th International Meeting of the Asia Oceania Geosciences Society (AOGS) | ||||||||||||
Event Location: | Bangkok, Thailand | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Dates: | 2007-07-30 - 2007-08-04 | ||||||||||||
Organizer: | Asia Oceania Geosciences Society | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||||||
HGF - Program: | Space (old) | ||||||||||||
HGF - Program Themes: | W EW - Erforschung des Weltraums | ||||||||||||
DLR - Research area: | Space | ||||||||||||
DLR - Program: | W EW - Erforschung des Weltraums | ||||||||||||
DLR - Research theme (Project): | W - Vorhaben Vergleichende Planetologie (old) | ||||||||||||
Location: | Berlin-Adlershof | ||||||||||||
Institutes and Institutions: | Institute of Planetary Research > Planetary Physics | ||||||||||||
Deposited By: | Musiol, Stefanie | ||||||||||||
Deposited On: | 22 Aug 2007 | ||||||||||||
Last Modified: | 27 Apr 2009 14:16 |
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