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The thermal inertia of an asteroid is an indicator of the thermophysical properties of the regolith and is determined by the size of grains on the surface. Previous thermophysical modeling studies of asteroids have identified or suggested…

Earth and Planetary Astrophysics · Physics 2021-07-14 Eric M. MacLennan , Joshua P. Emery

Disk instability is an attractive yet controversial means for the rapid formation of giant planets in our solar system and elsewhere. Recent concerns regarding the first adiabatic exponent of molecular hydrogen gas are addressed and shown…

Astrophysics · Physics 2009-11-13 Alan P. Boss

The phenomenological models of convection use characteristic length scales they do not determine but that are chosen to fit solar or stellar observations. We investigate if changes of these length scales are required between the Sun and low…

Solar and Stellar Astrophysics · Physics 2015-05-20 L. Piau , P. Kervella , S. Dib , P. Hauschildt

In this chapter we summarize current knowledge of the internal structure of giant planets. We concentrate on the importance of heavy elements and their role in determining the planetary composition and internal structure, in planet…

Earth and Planetary Astrophysics · Physics 2019-02-06 Ravit Helled , Tristan Guillot

Young protoplanetary discs are expected to be gravitationally unstable, which can drive angular momentum transport as well as be a potential mechanism for planet formation. Gravitational instability is most prevalent in the outer disc where…

Earth and Planetary Astrophysics · Physics 2025-03-31 Caitriona S. Leedham , Richard A. Booth , Cathie J. Clarke

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 formation of resonant pairs of planets in exoplanetary systems involves planetary migration in the protoplanetary disc. After a resonant capture, the subsequent migration in this configuration leads to a large increase of planetary…

Astrophysics · Physics 2009-10-22 A. Crida , Zs. Sándor , W. Kley

One of many challenges in forming giant gas planets via Gravitational disc Instability model (GI) is an inefficient radiative cooling of the pre-collapse fragments. Since fragment contraction times are as long at $10^5 -10^7$ years, the…

Earth and Planetary Astrophysics · Physics 2015-06-23 Sergei Nayakshin

(abridged) We calculate near-infrared thermal emission spectra using a doubling-adding radiative transfer code, which includes scattering by clouds and haze. Initial temperature profiles and cloud optical depths are taken from the…

Earth and Planetary Astrophysics · Physics 2011-08-08 R. J. de Kok , Ch. Helling , D. M. Stam , P. Woitke , S. Witte

The discovery of protoplanets and circumplanetary disks provides a unique opportunity to characterize planet formation through observations. Massive protoplanets shape the physical and chemical structure of their host circumstellar disk by…

Earth and Planetary Astrophysics · Physics 2024-04-15 Felipe Alarcón , Edwin Bergin

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

More than two dozen short-period Jupiter-mass gas giant planets have been discovered around nearby solar-type stars in recent years, several of which undergo transits, making them ideal for the detection and characterization of their…

Astrophysics · Physics 2009-11-13 Ian Dobbs-Dixon , D. N. C. Lin

Over the past decades, global geodynamical models have been used to investigate the thermal evolution of terrestrial planets. With the increase of computational power and improvement of numerical techniques, these models have become more…

Earth and Planetary Astrophysics · Physics 2022-08-22 Ana-Catalina Plesa , Mark Wieczorek , Martin Knapmeyer , Attilio Rivoldini , Michaela Walterova , Doris Breuer

The interest in the structure of ice-rich planetary bodies, in particular the differentiation between ice and rock, has grown due to the discovery of Kuiper belt objects and exoplanets. We thus carry out a parameter study for a range of…

Earth and Planetary Astrophysics · Physics 2022-03-30 Stephan Loveless , Dina Prialnik , Morris Podolak

Exoplanet demographics increasingly reveal that planetary properties depend not only on local irradiation and composition but also on the wider system architecture. We analyse a sample of Neptune-sized short-period planets with…

Earth and Planetary Astrophysics · Physics 2025-10-01 Dolev Bashi

With the use of long-term numerical simulations, we study the evolution and orbital behavior of cometary nuclei in cold Kuiper belt-like debris disks under the gravitational influence of dwarf planets (DPs); we carry out these simulations…

Earth and Planetary Astrophysics · Physics 2015-09-30 Marco A. Muñoz-Gutiérrez , Barbara Pichardo , Mauricio Reyes-Ruiz , Antonio Peimbert

Models of planet formation have shown that giant planets have a large impact on the number, masses and orbits of terrestrial planets that form. In addition, they play an important role in delivering volatiles from material that formed…

Earth and Planetary Astrophysics · Physics 2015-06-19 Elisa V. Quintana , Jack J. Lissauer

Simple self-consistent models of galaxy groups and clusters are tested against the results of high-resolution adiabatic gasdynamical simulations. We investigate two models based on the existence of a 'universal' dark matter density profile…

Astrophysics · Physics 2009-11-07 Y. Ascasibar , G. Yepes , V. Mueller , S. Gottloeber

The interior composition of exoplanets is not observable, limiting our direct knowledge of their structure, composition, and dynamics. Recently described observational trends suggest that rocky exoplanets, that is, planets without…

Earth and Planetary Astrophysics · Physics 2019-08-21 Cayman T. Unterborn , Wendy R. Panero

Recent structure models of Jupiter suggest the existence of an extended region in the deep interior with a high heavy element abundance, referred to as a dilute core. This finding has led to increased interest in modelling the formation and…

Earth and Planetary Astrophysics · Physics 2024-12-02 Jesse Polman , Christoph Mordasini