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Related papers: Giant Planet Formation, Evolution, and Internal St…

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Planet searches around evolved giant stars are bringing new insights to planet formation theories by virtue of the broader stellar mass range of the host stars compared to the solar-type stars that have been the subject of most current…

In the core accretion scenario of planet formation, rocky cores grow by first accreting solids until they are massive enough to accrete gas. For giant planet formation this means that a massive core must form within the lifetime of the gas…

Earth and Planetary Astrophysics · Physics 2023-06-21 Andrin Kessler , Yann Alibert

I discuss the role that disc fragmentation plays in the formation of gas giant and terrestrial planets, and how this relates to the formation of brown dwarfs and low-mass stars, and ultimately to the process of star formation. Protostellar…

Earth and Planetary Astrophysics · Physics 2015-06-15 Dimitris Stamatellos

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

We compare the planet-to-star mass-ratio distribution measured by gravitational microlensing to core accretion theory predictions from population synthesis models. The core accretion theory's runaway gas accretion process predicts a dearth…

Circumstellar discs likely have a short window when they are self-gravitating and prone to the effects of disc instability, but during this time the seeds of planet formation can be sown. It has long been argued that disc fragmentation can…

Earth and Planetary Astrophysics · Physics 2023-05-31 Hans Baehr

I attempt to summarize our knowledge of planet formation in evolving protoplanetary discs. I first review the physics of disc evolution and dispersal. For most of the disc lifetime evolution is driven by accretion and photoevaporation, and…

Earth and Planetary Astrophysics · Physics 2015-06-16 Richard Alexander

This review is based on lectures given at the 45th Saas-Fee Advanced Course 'From Protoplanetary Disks to Planet Formation' held in March 2015 in Les Diablerets, Switzerland. Starting with an overview of the main characterictics of the…

Earth and Planetary Astrophysics · Physics 2017-07-25 Wilhelm Kley

Theories of planet formation predict the birth of giant planets in the inner, dense, and gas-rich regions of the circumstellar disks around young stars. These are the regions from which strong CO emission is expected. Observations have so…

Solar and Stellar Astrophysics · Physics 2015-05-20 Zs. Regaly , L. Kiss , Zs. Sandor , C. P. Dullemond

Gas giant planets are far easier than terrestrial planets to detect around other stars, and are thought to form much more quickly than terrestrial planets. Thus, in systems with giant planets, the late stages of terrestrial planet formation…

Astrophysics · Physics 2009-11-11 Sean N. Raymond

Several planetary systems are known to host multiple giant planets. However, when two giant planets are accreting from the same disk, it is unclear what effect the presence of the second planet has on the gas accretion process of both…

Earth and Planetary Astrophysics · Physics 2023-01-25 Camille Bergez-Casalou , Bertram Bitsch , Sean N. Raymond

In this paper we investigate the formation of Uranus and Neptune, according to the core-nucleated accretion model, considering formation locations ranging from 12 to 30 AU from the Sun, and with various disk solid-surface densities and core…

Earth and Planetary Astrophysics · Physics 2015-06-19 Ravit Helled , Peter Bodenheimer

We present a statistical study of the post-formation migration of giant planets in a range of initial disk conditions. For given initial conditions we model the evolution of giant planet orbits under the influence of disk, stellar, and mass…

Astrophysics · Physics 2009-11-07 David E. Trilling , Jonathan I. Lunine , Willy Benz

We investigate the accretion flow around a giant planet using two-dimensional hydrodynamical simulations by studying the local region of accretion disk around the planet. The results show that, when the initial orbit of the planet embedded…

Earth and Planetary Astrophysics · Physics 2024-10-29 Wenshuai Liu

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…

Giant impacts refer to collisions between two objects each of which is massive enough to be considered at least a planetary embryo. The putative collision suffered by the proto-Earth that created the Moon is a prime example, though most…

Earth and Planetary Astrophysics · Physics 2016-04-13 Mark C. Wyatt , Alan P. Jackson

Planet formation models have been developed during the last years in order to try to reproduce the observations of both the solar system, and the extrasolar planets. Some of these models have partially succeeded, focussing however on…

Earth and Planetary Astrophysics · Physics 2015-06-16 Y. Alibert , F. Carron , A. Fortier , S. Pfyffer , W. Benz , C. Mordasini , D. Swoboda

We calculate the evolution of gas giant planets during the runaway gas accretion phase of formation, to understand how the luminosity of young giant planets depends on the accretion conditions. We construct steady-state envelope models, and…

Earth and Planetary Astrophysics · Physics 2017-01-11 David Berardo , Andrew Cumming , Gabriel-Dominique Marleau

We propose a pebble-driven core accretion scenario to explain the formation of giant planets around the late-M dwarfs of $M_{\star}{=}0.1{-}0.2 \ M_{\odot}$. In order to explore the optimal disk conditions for giant planet, we perform…

Earth and Planetary Astrophysics · Physics 2023-11-20 Mengrui Pan , Beibei Liu , Anders Johansen , Masahiro Ogihara , Su Wang , Jianghui Ji , Sharon X. Wang , Fabo Feng , Ignasi Riba

We run numerical simulations to study the accretion of gas and dust grains onto gas giant planets embedded into massive protoplanetary discs. The outcome is found to depend on the disc cooling rate, planet mass, grain size and irradiative…

Earth and Planetary Astrophysics · Physics 2019-07-18 Jack Humphries , Sergei Nayakshin