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The hundreds of exoplanets that have been discovered in the past two decades offer a new perspective on planetary structure. Instead of being the archetypal examples of planets, those of our Solar System are merely possible outcomes of…

Earth and Planetary Astrophysics · Physics 2015-06-18 David S. Spiegel , Jonathan J. Fortney , Christophe Sotin

Noble gases are accreted to the giant planets as part of the gas component of the planet-forming disk. While heavier noble gases can separate from the evolution of the hydrogen-rich gas, helium is thought to remain at the protosolar H/He…

Earth and Planetary Astrophysics · Physics 2024-06-25 N. Nettelmann , M. Cano Amoros , N. Tosi , J. J. Fortney , R. Helled

Systems of close-in super-Earths display striking diversity in planetary bulk density and composition. Giant impacts are expected to play a role in the formation of many of these worlds. Previous works, focused on the mechanical shock…

Earth and Planetary Astrophysics · Physics 2019-03-27 John B. Biersteker , Hilke E. Schlichting

Close-in giant planets are thought to have formed in the cold outer regions of planetary systems and migrated inward, passing through the orbital parameter space occupied by the terrestrial planets in our own Solar System. We present…

Astrophysics · Physics 2011-02-11 Avi M. Mandell , Sean N. Raymond , Steinn Sigurdsson

We consider the thermal structure and radii of strongly irradiated gas giant planets over a range in mass and irradiating flux. The cooling rate of the planet is sensitive to the surface boundary condition, which depends on the detailed…

Astrophysics · Physics 2008-11-26 Phil Arras , Lars Bildsten

The evolution of gaseous planets is a complex process influenced by various physical parameters and processes. In this study, we present critical modifications to the Modules for Experiments in Stellar Astrophysics (MESA) code to enhance…

Earth and Planetary Astrophysics · Physics 2025-11-11 Ravit Helled , Simon Müller , Henrik Knierim

Giant planets have key role in shaping planetary systems. Their composition reveals information on the conditions at which planets form, and their interiors serve as natural laboratories to explore the behavior of materials at extreme…

Earth and Planetary Astrophysics · Physics 2026-05-05 Ravit Helled

Close-in giant planets (e.g. ``Hot Jupiters'') are thought to form far from their host stars and migrate inward, through the terrestrial planet zone, via torques with a massive gaseous disk. Here we simulate terrestrial planet growth during…

Astrophysics · Physics 2009-11-11 Sean N. Raymond , Avi M. Mandell , Steinn Sigurdsson

Seismology applied to giant planets could drastically change our understanding of their deep interiors, as it has happened with the Earth, the Sun, and many main-sequence and evolved stars. The study of giant planets' composition is…

Earth and Planetary Astrophysics · Physics 2022-03-08 Patrick Gaulme , Benoit Mosser , Francois-Xavier Schmider , Tristan Guillot , Jason Jackiewicz

We briefly examine the properties of dense plasmas characteristic of the interior of giant planets and the atmospheres of neutron stars. Special attention is devoted to the equation of state of hydrogen and helium at high density and to the…

Astrophysics · Physics 2009-11-11 G. Chabrier , D. Saumon , A. Potekhin

New equations of state (EOS) for hydrogen, helium, and compounds containing heavier elements are used to construct models for the structures of the planets Jupiter and Saturn. Good agreement with the gravitational moments J2 and J4 is…

Earth and Planetary Astrophysics · Physics 2013-07-12 Gerald I. Kerley

There are still many open questions regarding the nature of Uranus and Neptune, the outermost planets in the Solar System. In this review we summarize the current-knowledge about Uranus and Neptune with a focus on their composition and…

Earth and Planetary Astrophysics · Physics 2020-04-15 Ravit Helled , Nadine Nettelmann , Tristan Guillot

The wealth of observational data about Jupiter and Saturn provides strong constraints to guide our understanding of the formation of giant planets. The size of the core and the total amount of heavy elements in the envelope have been…

Astrophysics · Physics 2009-11-11 Yann Alibert , Olivier Mousis , Christoph Mordasini , Willy Benz

We present the first models of Saturn and Jupiter to couple their evolution to both a radiative-atmosphere grid and to high-pressure phase diagrams of hydrogen with helium. The purpose of these models is to quantify the evolutionary effects…

Astrophysics · Physics 2009-11-10 Jonathan J. Fortney , W. B. Hubbard

The impact of the inner structure and thermal history of planets on their observable features, such as luminosity or magnetic field, crucially depends on the poorly known heat and charge transport properties of their internal layers. The…

Materials Science · Physics 2020-07-15 Federico Grasselli , Lars Stixrude , Stefano Baroni

Astronomical surveys have identified numerous exoplanets with bulk compositions that are unlike the planets of the Solar System, including rocky super-Earths and gas-enveloped sub-Neptunes. Observing the atmospheres of these objects…

Earth and Planetary Astrophysics · Physics 2025-10-13 Tim Lichtenberg , Oliver Shorttle , Johanna Teske , Eliza M. -R. Kempton

The characterisation of giant exoplanets is crucial to constrain giant planet formation and evolution theory and for putting the solar-system's giant planets in perspective. Typically, mass-radius (M-R) measurements of moderately irradiated…

Earth and Planetary Astrophysics · Physics 2023-05-01 Simon Müller , Ravit Helled

Recent observations of extrasolar gas giants suggest super-stellar C/O ratios in planetary atmospheres, while interior models of observed extrasolar giant planets additionally suggest high heavy element contents. Furthermore, recent…

Earth and Planetary Astrophysics · Physics 2021-10-13 Aaron David Schneider , Bertram Bitsch

We present thermodynamic material and transport properties for the extreme conditions prevalent in the interiors of massive giant planets and brown dwarfs. They are obtained from extensive \textit{ab initio} simulations of hydrogen-helium…

Earth and Planetary Astrophysics · Physics 2018-09-19 Andreas Becker , Mandy Bethkenhagen , Clemens Kellermann , Johannes Wicht , Ronald Redmer

We provide a brief review of many aspects of the planetary physics of hot Jupiters. Our aim is to cover most of the major areas of current study while providing the reader with additional references for more detailed follow-up. We first…

Earth and Planetary Astrophysics · Physics 2021-03-17 Jonathan J. Fortney , Rebekah I. Dawson , Thaddeus D. Komacek