Evolution of Titan's rocky core constrained by Cassini observations

Details Evolution of Titan's rocky core constrained by Cassini observations Evolution of Titan's rocky core constrained by Cassini observations

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3720205c&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 20, CiteID L20205

Physics

10

Planetary Sciences: Comets And Small Bodies: Interiors (8147), Planetary Sciences: Solid Surface Planets: Interiors (8147), Planetary Sciences: Solid Surface Planets: Physical Properties Of Materials

Scientific paper

We model the thermal evolution of Titan's core and search for solutions that are consistent with the mean moment of inertia yielded by the Cassini-Huygens Mission. Like previous studies we assume that Titan's core is enriched in hydrated silicates. However, our modeling accounts for the possible dehydration of these minerals. The resulting models are consistent with Titan's moment of inertia if the inner dry silicate core remains smaller than ˜1300 km in radius. This constraint is met if at least 30% of potassium was leached from the silicate during the hydration event, i.e., the core is depleted in one of its major heat source. In this scenario, the core is currently undergoing dehydration.

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