Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...391..817c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 391, no. 2, June 1, 1992, p. 817-826.
Astronomy and Astrophysics
Astrophysics
117
Equations Of State, Helium Hydrogen Atmospheres, Jupiter (Planet), Metallic Hydrogen, Phase Transformations, Planetary Structure, Saturn (Planet), Abundance, Giant Stars
Scientific paper
Recently, a new equation of state for hydrogen which predicts a molecular-metallic phase transition at finite temperature has become available. It is combined with a helium equation of state, and the resulting thermodynamic description of H/He mixtures is used to compute interior models of Jupiter and Saturn, subject to the constraints of the measured gravitational harmonics of both planets. The inferred heavy element abundance distribution in their interior and the possible consequences on their formation are discussed. In particular, the Z-element enhancement and smaller core in Saturn relative to Jupiter, a conclusion of this study, may indicate a depletion of water ice in the Jupiter formation zone.
Chabrier Gilles
Hubbard William B.
Lunine Jonathan I.
Saumon Didier
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