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The primordial internal structures of gas giant planets are unknown. Often giant planets are modeled under the assumption that they are adiabatic, convective, and homogeneously mixed, but this is not necessarily correct. In this work, we…

Earth and Planetary Astrophysics · Physics 2015-06-23 Allona Vazan , Ravit Helled , Attay Kovetz , Morris Podolak

Volatiles are compounds with low sublimation temperatures, and they make up most of the condensible mass in typical planet-forming environments. They consist of relatively small, often hydrogenated, molecules based on the abundant elements…

Earth and Planetary Astrophysics · Physics 2015-06-18 Klaus M. Pontoppidan , Colette Salyk , Edwin A. Bergin , Sean Brittain , Bernard Marty , Olvier Mousis , Karin L. Oberg

The formation of the Earth's core is a consequence of planetary accretion and processes in the Earth's interior. The mechanical process of planetary differentiation is likely to occur in large, if not global, magma oceans created by the…

Earth and Planetary Astrophysics · Physics 2016-12-14 David C. Rubie , Seth A. Jacobson

Exoplanets with substantial Hydrogen/Helium atmospheres have been discovered in abundance, many residing extremely close to their parent stars. The extreme irradiation levels these atmospheres experience causes them to undergo hydrodynamic…

Earth and Planetary Astrophysics · Physics 2019-06-12 James E. Owen

Many super-Earths are on very short orbits around their host star and, therefore, more likely to be tidally locked. Because this locking can lead to a strong contrast between the dayside and nightside surface temperatures, these…

In this chapter, we explore how gravitational interactions drive turbulent flows inside planetary cores and provide an interesting alternative to convection to explain dynamo action and magnetic fields around terrestrial bodies. In the…

Geophysics · Physics 2019-07-04 Thomas Le Reun , Michael Le Bars

The present Martian climate is characterized by a cold and dry environment with a thin atmosphere of carbon dioxides (CO2). In such conditions, the planetary climate and habitability are determined by the distribution of CO2 between…

Earth and Planetary Astrophysics · Physics 2025-09-10 Yasuto Watanabe , Eiichi Tajika , Arihiro Kamada

Prevailing models for the formation of the Moon invoke a giant impact between a planetary embryo and the proto-Earth \citep{Canup_2004, Cuk_Stewart_2012}. Despite similarities in the isotopic and chemical abundances of refractory elements…

Earth and Planetary Astrophysics · Physics 2021-05-04 S. Charnoz , P. A. Sossi , Y-N Lee , J. Siebert , R. Hyodo , L. Allibert , F. C. Pignatale , M. Landeau , A. V. Oza , F. Moynier

Planetary embryos form protoplanets via mutual collisions, which can lead to the development of magma oceans. During their solidification, large amounts of the mantles' volatile contents may be outgassed. The resulting H$_2$O/CO$_2$…

Earth and Planetary Astrophysics · Physics 2017-10-30 P. Odert , H. Lammer , N. V. Erkaev , A. Nikolaou , H. I. M. Lichtenegger , C. P. Johnstone , K. G. Kislyakova , M. Leitzinger , N. Tosi

The ejection of planets by the instability of planetary systems is a potential source of free-floating planets. We numerically simulate multi-planet systems to study the evolution process, the properties of surviving systems, and the…

Earth and Planetary Astrophysics · Physics 2025-09-16 Ruocheng Zhai , Man Hoi Lee , Tianjun Gan , Shude Mao

Uranus provides a unique laboratory to test our understanding of planetary atmospheres under extreme conditions. Multi-spectral observations from Voyager, ground-based observatories, and space telescopes have revealed a delicately banded…

Earth and Planetary Astrophysics · Physics 2021-05-14 Leigh N. Fletcher

The Solar System's orbital structure is thought to have been sculpted by an episode of dynamical instability among the giant planets. However, the instability trigger and timing have not been clearly established. Hydrodynamical modeling has…

Earth and Planetary Astrophysics · Physics 2022-05-11 Beibei Liu , Sean N. Raymond , Seth A. Jacobson

Ice-rich planets are formed exterior to the water ice-line and thus are expected to contain a substantial amount of ices. The high ice content leads to unique conditions in the interior, under which the structure of a planet is affected by…

Earth and Planetary Astrophysics · Physics 2022-03-09 Allona Vazan , Re'em Sari , Ronit Kessel

Over large timescales, a terrestrial planet may be driven towards spin-orbit synchronous rotation by tidal forces. In this particular configuration, the planet exhibits permanent dayside and nightside, which may induce strong day-night…

Earth and Planetary Astrophysics · Physics 2020-07-01 Pierre Auclair-Desrotour , Kevin Heng

We present simulations of atmospheres of Earth-like aquaplanets that are tidally locked to their star, that is, planets whose orbital period is equal to the rotation period about their spin axis, so that one side always faces the star and…

Earth and Planetary Astrophysics · Physics 2011-03-11 Timothy M. Merlis , Tapio Schneider

Two fundamentally different processes of rocky planet formation exist, but it is unclear which one built the terrestrial planets of the solar system. Either they formed by collisions among planetary embryos from the inner solar system, or…

Placing the architecture of the Solar System within the broader context of planetary architectures is one of the primary topics of interest within planetary science. Exoplanet discoveries have revealed a large range of system architectures,…

Earth and Planetary Astrophysics · Physics 2023-02-23 Stephen R. Kane

The initial abundance of radioactive heat producing isotopes in the interior of a terrestrial planet are important drivers of its thermal evolution and the related tectonics and possible evolution to an Earth-like habitat. The moderately…

Earth and Planetary Astrophysics · Physics 2022-11-16 N. Erkaev , M. Scherf , O. Herbort , H. Lammer , P. Odert , D. Kubyshkina , M. Leitzinger , P. Woitke , C. O'Neill

In the last few years astronomical surveys have expanded the reach of planetary science into the realm of small and dense extrasolar worlds. These share a number of characteristics with the terrestrial and icy planetary objects of the Solar…

Earth and Planetary Astrophysics · Physics 2024-09-20 Tim Lichtenberg , Yamila Miguel

Planets with large moon(s) or those in the habitable zone of low-mass stars may experience much stronger tidal force and tide-induced ocean mixing than that on Earth. Thus, the vertical diffusivity (or, more precisely, diapycnal…

Earth and Planetary Astrophysics · Physics 2022-02-02 Yidongfang Si , Jun Yang , Yonggang Liu
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