A PRELIMINARY JUPITER MODEL

William B. Hubbard, B. Militzer

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

In anticipation of new observational results for Jupiter's axial moment of inertia and gravitational zonal harmonic coefficients from the forthcoming Juno orbiter, we present a number of preliminary Jupiter interior models. We combine results from ab initio computer simulations of hydrogen-helium mixtures, including immiscibility calculations, with a new nonperturbative calculation of Jupiter's zonal harmonic coefficients, to derive a self-consistent model for the planet's external gravity and moment of inertia. We assume helium rain modified the interior temperature and composition profiles. Our calculation predicts zonal harmonic values to which measurements can be compared. Although some models fit the observed (pre-Juno) second- and fourth-order zonal harmonics to within their error bars, our preferred reference model predicts a fourth-order zonal harmonic whose absolute value lies above the pre-Juno error bars. This model has a dense core of about 12 Earth masses and a hydrogen-helium-rich envelope with approximately three times solar metallicity.

Original languageEnglish (US)
Article number80
JournalAstrophysical Journal
Volume820
Issue number1
DOIs
StatePublished - Mar 20 2016

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Keywords

  • equation of state
  • planets and satellites: composition
  • planets and satellites: gaseous planets
  • planets and satellites: interiors

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

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