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Analysis of the statistical properties of exoplanets, together with those of their host stars, are providing a unique view into the process of planet formation and evolution. In this paper we explore the properties of the mass distribution…

We propose that two of the most surprising results so far among exoplanet discoveries are related: the existences of both hot Jupiters and the high frequency of multi-planet systems with periods $P\lesssim200$~days. In this paradigm, the…

Earth and Planetary Astrophysics · Physics 2016-02-03 A. C. Boley , A. P. Granados Contreras , B. Gladman

We build on recent new evolutionary models of Jupiter and Saturn and here extend our calculations to investigate the evolution of extrasolar giant planets of mass 0.15 to 3.0 M_J. Our inhomogeneous thermal history models show that the…

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

Uranus and Neptune are the archetypes of "ice giants", a class of planets that may be among the most common in the Galaxy. They hold the keys to understand the atmospheric dynamics and structure of planets with hydrogen atmospheres inside…

We have now accumulated a wealth of observations of the planet-formation environment and of mature planetary systems. These data allow us to test and refine theories of gas-giant planet formation by placing constraints on the conditions and…

During their formation, planets form large, hot atmospheres due to the ongoing accretion of solids. It has been customary to assume that all solids end up at the center constituting a "core" of refractory materials, whereas the envelope…

Earth and Planetary Astrophysics · Physics 2021-03-31 Chris Ormel , Allona Vazan , Marc Brouwers

Many planets in the solar system and across the galaxy have hydrogen-rich atmospheres overlying more heavy element-rich interiors with which they interact for billions of years. Atmosphere-interior interactions are thus crucial to…

Earth and Planetary Astrophysics · Physics 2024-07-08 Akash Gupta , Lars Stixrude , Hilke E. Schlichting

Our recent N-body simulations of planetary system formation, incorporating models for the main physical processes thought to be important during the building of planets (i.e. gas disc evolution, migration, planetesimal/boulder accretion,…

Earth and Planetary Astrophysics · Physics 2016-07-27 Gavin A. L. Coleman , Richard P. Nelson

In this review, I briefly summarize the present status of experimental and theoretical investigations of the properties of matter under conditions characteristic of planetary interiors, from terrestrial to jovian planets. I first focus on…

Earth and Planetary Astrophysics · Physics 2015-05-14 Gilles Chabrier

We study the orbital evolution of the 4 giant planets of our solar system in a gas disk. Our investigation extends the previous works by Masset and Snellgrove (2001) and Morbidelli and Crida (2007, MC07), which focussed on the dynamics of…

Within the general framework of core-nucleated accretion theory of giant planet formation, the conglomeration of massive gaseous envelopes is facilitated by a transient period of rapid accumulation of nebular material. While the concurrent…

Earth and Planetary Astrophysics · Physics 2018-04-18 Konstantin Batygin

Super-Earths and sub-Neptunes are commonly thought to have accreted hydrogen/helium envelopes, consisting of a few to ten percent of their total mass, from the primordial gas disk. Subsequently, hydrodynamic escape driven by core-powered…

Earth and Planetary Astrophysics · Physics 2021-04-07 William Misener , Hilke E. Schlichting

Exoplanets around different types of stars provide a window into the diverse environments in which planets form. This chapter describes the observed relations between exoplanet populations and stellar properties and how they connect to…

Earth and Planetary Astrophysics · Physics 2024-03-06 Gijs D. Mulders

We review the state of the field of terrestrial planet formation with the goal of understanding the formation of the inner Solar System and low-mass exoplanets. We review the dynamics and timescales of accretion from planetesimals to…

Earth and Planetary Astrophysics · Physics 2015-06-18 Sean N. Raymond , Eiichiro Kokubo , Alessandro Morbidelli , Ryuji Morishima , Kevin J. Walsh

The relationship between the compositions of giant planets and their host stars is of fundamental interest in understanding planet formation. The solar system giant planets are enhanced above solar composition in metals, both in their…

Earth and Planetary Astrophysics · Physics 2019-12-11 Johanna K. Teske , Daniel Thorngren , Jonathan J. Fortney , Natalie Hinkel , John M. Brewer

Our understanding of the process of terrestrial planet formation has grown markedly over the past 20 years, yet key questions remain. This review begins by first addressing the critical, earliest stage of dust coagulation and concentration.…

Earth and Planetary Astrophysics · Physics 2024-11-07 Matthew S. Clement , Andre Izidoro , Sean N. Raymond , Rogerio Deienno

We construct models of the structural evolution of super-Earth- and mini-Neptune-type exoplanets with hydrogen-helium envelopes, incorporating radiative cooling and XUV-driven mass loss. We conduct a parameter study of these models,…

Earth and Planetary Astrophysics · Physics 2015-08-06 Alex R. Howe , Adam S. Burrows

The formation of the giant planets in our solar system, and likely a majority of giant exoplanets, is commonly explained by the accretion of nebular hydrogen and helium onto a large core of terrestrial-like composition. The fate of this…

Earth and Planetary Astrophysics · Physics 2015-06-15 Sean Wahl , Hugh F. Wilson , Burkhard Militzer

Recent discoveries of water-rich, sub-Neptunian to Neptunian-massed exoplanets with short-period orbits present a new parameter space for the study of exoplanetary dynamos. We explore the geometry of the dynamo source region within this…

Earth and Planetary Astrophysics · Physics 2015-06-15 Bob Yunsheng Tian , Sabine Stanley

The first mass-estimate of an exoplanet around a Sun-like star, 51 Peg b and the first radius measurement of an exoplanet, HD209458b pointed to the challenges of understanding the atmosphere, interior, and evolution of exoplanets including…

Earth and Planetary Astrophysics · Physics 2021-12-15 Nadine Nettelmann , Diana Valencia