Ceres - Neither a porous nor salty ball

Details Ceres - Neither a porous nor salty ball Ceres - Neither a porous nor salty ball

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011icar..215..599c&link_type=abstract

Icarus, Volume 215, Issue 2, p. 599-602.

Physics

1

Scientific paper

This study explores the geophysical implications of two compositional models recently proposed for Ceres, which assume that the dwarf planet is a homogeneous mixture of chondritic material devoid with free water. In order to reproduce Ceres' density, the rock density has to be offset by the presence of porosity and/or an abundance of hydrated salts resulting from the extensive hydration and oxidation of the chondritic material. Thermal modeling shows that a mixture of hydrated minerals is bound to compact and partly dehydrate as a consequence of long-lived radioisotope decay heat. The resulting interior structure is differentiated in a silicate-rich core and water-rich shell, with little porosity. Hence, this study confirms previous suggestion that Ceres contains a large fraction of free water.

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