The molecular-metallic transition of hydrogen and the structure of Jupiter and Saturn

Gilles Chabrier, Didier Saumon, William B. Hubbard, Jonathan I. Lunine

Research output: Contribution to journalArticle

128 Citations (Scopus)

Abstract

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. We discuss the inferred heavy element abundance distribution in their interiors and the possible consequences on their formation. 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. In a companion paper, we investigate the effect of the molecular-metallic phase transition on the thermal evolution of Jupiter, Saturn, and brown dwarfs.

Original languageEnglish (US)
Pages (from-to)817-826
Number of pages10
JournalAstrophysical Journal
Volume391
Issue number2
StatePublished - Jun 1 1992

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Saturn
Jupiter (planet)
Jupiter
hydrogen
phase transition
equation of state
equations of state
thermal evolution
heavy elements
helium
planets
ice
depletion
planet
thermodynamics
harmonics
augmentation
water
temperature

Keywords

  • Equation of state
  • Molecular processes
  • Planets and satellites: individual (Jupiter, Saturn)

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

The molecular-metallic transition of hydrogen and the structure of Jupiter and Saturn. / Chabrier, Gilles; Saumon, Didier; Hubbard, William B.; Lunine, Jonathan I.

In: Astrophysical Journal, Vol. 391, No. 2, 01.06.1992, p. 817-826.

Research output: Contribution to journalArticle

Chabrier, Gilles ; Saumon, Didier ; Hubbard, William B. ; Lunine, Jonathan I. / The molecular-metallic transition of hydrogen and the structure of Jupiter and Saturn. In: Astrophysical Journal. 1992 ; Vol. 391, No. 2. pp. 817-826.
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