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The primordial structure of Jupiter remains uncertain, yet it holds vital clues on the planet's formation and early evolution. Recent work used dynamical constraints from Jupiter's inner moons to determine its primordial state, thereby…

Earth and Planetary Astrophysics · Physics 2026-02-04 Henrik Knierim , Konstantin Batygin , Ravit Helled , Luca Morf , Fred C. Adams

The amount and distribution of heavy elements in Jupiter gives indications on the process of its formation and evolution. Core mass and metallicity predictions however depend on the equations of state used, and on model assumptions. We…

Earth and Planetary Astrophysics · Physics 2012-05-04 Nadine Nettelmann , Andreas Becker , Bastian Holst , Ronald Redmer

Constraining Jupiter's internal structure is crucial for understanding its formation and evolution history. Recent interior models of Jupiter that fit Juno's measured gravitational field suggest an inhomogeneous interior and potentially the…

Earth and Planetary Astrophysics · Physics 2021-03-31 Benno A. Neuenschwander , Ravit Helled , Naor Movshovitz , Jonathan J. Fortney

'Empirical' models (pressure vs. density) of Uranus and Neptune interiors constrained by the gravitational coefficients J_2, J_4, the planetary radii and masses, and Voyager solid-body rotation periods are presented. The empirical…

Earth and Planetary Astrophysics · Physics 2015-05-20 Ravit Helled , John D. Anderson , Morris Podolak , Gerald Schubert

The properties of hydrogen-helium mixtures at high pressure are crucial to address important questions about the interior of Giant planets e.g. whether Jupiter has a rocky core and did it emerge via core accretion? Using path integral Monte…

Materials Science · Physics 2009-11-10 Burkhard Militzer

New interior models of Jupiter and Saturn suggest that both planets have "fuzzy cores". These cores should be viewed as central regions that are enriched with heavy elements but are not distinct from the rest of the deep interior. These…

Earth and Planetary Astrophysics · Physics 2024-03-19 Ravit Helled , David J. Stevenson

The core accretion model for giant planet formation suggests a two layer picture for the initial structure of Jovian planets, with heavy elements in a dense core and a thick H-He envelope. Late planetesimal accretion and core erosion could…

Earth and Planetary Astrophysics · Physics 2016-09-21 Francois Soubiran , Burkhard Militzer

The immiscibility of hydrogen-helium mixture under the temperature and pressure conditions of planetary interiors is crucial for understanding the structures of gas giant planets (e.g., Jupiter and Saturn). While the experimental probe at…

Observations of Jupiter's gravity field by Juno have revealed surprisingly small values for the high order gravitational moments, considering the abundances of heavy elements measured by Galileo 20 years ago. The derivation of recent…

Earth and Planetary Astrophysics · Physics 2019-02-27 Florian Debras , Gilles Chabrier

We present the first models of Jupiter and Saturn to couple their evolution to both a radiative-atmosphere grid and to high-pressure phase diagrams of hydrogen with helium and other admixtures. We find that prior calculated phase diagrams…

Astrophysics · Physics 2009-11-07 Jonathan J. Fortney , William B. Hubbard

The Juno mission has revolutionized and challenged our understanding of Jupiter. As Juno transitioned to its extended mission, we review the major findings of Jupiter's internal structure relevant to understanding Jupiter's formation and…

Many hot and ultra-hot Jupiters have inflated radii, implying that their interiors retain significant entropy from formation. These hot interiors lead to an enhanced internal heat flux that impinges upon the atmosphere from below. In this…

Earth and Planetary Astrophysics · Physics 2022-12-29 Thaddeus D. Komacek , Peter Gao , Daniel P. Thorngren , Erin M. May , Xianyu Tan

The internal structure of Jupiter is constrained by the precise gravity field measurements by NASA's Juno mission, atmospheric data from the Galileo entry probe, and Voyager radio occultations. Not only are these observations few compared…

Earth and Planetary Astrophysics · Physics 2024-12-10 Maayan Ziv , Eli Galanti , Saburo Howard , Tristan Guillot , Yohai Kaspi

A giant impact has been proposed as a possible formation mechanism for Jupiter's dilute core -- the planet's inferred internal structure in which the transition between its core of heavy elements and its predominantly hydrogen-helium…

Earth and Planetary Astrophysics · Physics 2025-08-28 T. D. Sandnes , V. R. Eke , J. A. Kegerreis , R. J. Massey , L. F. A. Teodoro

Revealing the true nature of the gas giant planets in our Solar System is challenging. The masses of Jupiter and Saturn are about 318 and 95 Earth masses, respectively. While they mostly consist of hydrogen and helium, the total mass and…

Earth and Planetary Astrophysics · Physics 2022-02-22 Ravit Helled , Naor Movshovitz , Nadine Nettelmann

We present evolutionary sequences for Jupiter and Saturn, based on new nongray model atmospheres, which take into account the evolution of the solar luminosity and partitioning of dense components to deeper layers. The results are used to…

Astrophysics · Physics 2009-10-31 W. B. Hubbard , T. Guillot , M. S. Marley , A. Burrows , J. I. Lunine , D. S. Saumon

The equation of state of hydrogen, helium, and water effects interior structure models of giant planets significantly. We present a new equation of state data table, LM-REOS, generated by large scale quantum molecular dynamics simulations…

Astrophysics · Physics 2008-11-07 N. Nettelmann , B. Holst , A. Kietzmann , M. French , R. Redmer , D. Blaschke

Recent structure models of Jupiter that match Juno gravity data suggest that the planet harbours an extended region in its deep interior that is enriched in heavy elements, a so-called dilute/fuzzy core. This finding raises the question of…

Earth and Planetary Astrophysics · Physics 2020-07-01 Simon Müller , Ravit Helled , Andrew Cumming

Recent observations of Jupiter and Saturn provided by spacecraft missions, such as Juno and Cassini, compel us to revise and improve our models of giant planet interiors. Even though hydrogen and helium are by far the dominant species in…

Earth and Planetary Astrophysics · Physics 2017-03-30 François Soubiran , Burkhard Militzer , Kevin P. Driver , Shuai Zhang

The formation history of giant planets determines their primordial structure and consequent evolution. We simulate various formation paths of Jupiter to determine its primordial entropy, and find that a common outcome is for proto-Jupiter…

Earth and Planetary Astrophysics · Physics 2018-05-02 Andrew Cumming , Ravit Helled , Julia Venturini