Journal
ASTROPHYSICAL JOURNAL
Volume 745, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/745/1/54
Keywords
planets and satellites: dynamical evolution and stability; planets and satellites: individual (Jupiter, Saturn); planets and satellites: interiors
Categories
Funding
- NASA
- NSF
- Direct For Mathematical & Physical Scien [1008045, 905801] Funding Source: National Science Foundation
- Division Of Astronomical Sciences [1008045, 905801] Funding Source: National Science Foundation
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Using ab initio simulations we investigate whether water ice is stable in the cores of giant planets, or whether it dissolves into the layer of metallic hydrogen above. By Gibbs free energy calculations we find that for pressures between 10 and 40 Mbar the ice-hydrogen interface is thermodynamically unstable at temperatures above approximately 3000 K, far below the temperature of the core-mantle boundaries in Jupiter and Saturn. This implies that the dissolution of core material into the fluid layers of giant planets is thermodynamically favored, and that further modeling of the extent of core erosion is warranted.
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