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Dissipation of tidal energy in planetary satellites

Sohl, F. and Hussmann, H. and Wagner, F.W. (2012) Dissipation of tidal energy in planetary satellites. Planetary Origins and Frontiers of Exploration, 2012-05-27 -- 2012-06-03, Rehovot, Israel.

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Abstract

Most natural satellites are in synchronous rotation and subject to tidal forces exerted by their primaries. The ellipsoidal shape of their surfaces was acquired early after formation and tidal despinning, when their deep interiors were sufficiently hot and deformable and hardly overlain by thin lithospheres. The nonspherical part of their present low-degree gravity fields is predominated by spin and tidal contributions, which are related to the radial mass distribution. In addition, tidally-induced, time-variable surface distortion and gravity variation due to tiny radial and librational tides occur along slightly eccentric orbits, thereby causing the dissipation of tidal energy. This has important consequences for the thermal state and orbital evolution of planetary satellites. Based on interior structure models and assumptions on tidally-effective rheological properties of planetary materials (i.e. ice, rock, internal ocean), we will address the tidal response of some active satellites in the outer solar system and examine the role of tidal heating for their past or present geologic activity.

Document Type:Conference or Workshop Item (Poster)
Title:Dissipation of tidal energy in planetary satellites
Authors:
AuthorsInstitution or Email of Authors
Sohl, F.frank.sohl@dlr.de
Hussmann, H.hauke.hussmann@dlr.de
Wagner, F.W.frank.wagner@dlr.de
Date:June 2012
Status:Published
Keywords:satellites, tidal response, interiors, compositions, rheology, dissipation
Event Title:Planetary Origins and Frontiers of Exploration
Event Location:Rehovot, Israel
Event Type:international Conference
Event Dates:2012-05-27 -- 2012-06-03
Organizer:The Center for Planetary Science, Weizmann Institute of Science
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 Exploration des Sonnensystems (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Planetary Physics
Deposited By: Frank Sohl
Deposited On:12 Jul 2012 16:14
Last Modified:12 Jul 2012 16:14

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