Physics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3419203n&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 19, CiteID L19203
Physics
9
Planetary Sciences: Solid Surface Planets: Gravitational Fields (1221), Planetary Sciences: Solid Surface Planets: Ices, Planetary Sciences: Solid Surface Planets: Orbital And Rotational Dynamics (1221), Planetary Sciences: Solar System Objects: Saturnian Satellites, Planetary Sciences: Solar System Objects: Uranian Satellites
Scientific paper
Large impact basins are present on many of the icy satellites of the outer solar system. Assuming that their present-day topography is uncompensated, such basins can cause significant poleward reorientations for slow-rotating satellites. This reorientation may have been accompanied by transient large-amplitude wobble. The largest basins on Tethys, Rhea and Titania are predicted to have caused reorientations of roughly 4°, 7° and 12°, respectively, resulting in global tectonic stresses up to ~0.5 MPa. The potential anomalies associated with the basins can be up to one-third of those expected for a hydrostatic, tidally- and rotationally-deformed body, and may complicate interpretation of the satellite interior structure. Pluto and Charon, because of their slow rotation, are also likely to have undergone reorientation of 10-20° if they possess impact basins of comparable sizes to those of the Saturnian satellites.
Matsuyama Isamu
Nimmo Francis
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