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Related papers: On the Minimum Core Mass for Giant Planet Formatio…

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Gas-giant planets, like Jupiter and Saturn, acquire massive gaseous envelopes during the approximately 3 Myr-long lifetimes of protoplanetary discs. In the core accretion scenario, the formation of a solid core of around 10 Earth masses…

Earth and Planetary Astrophysics · Physics 2019-09-25 Michiel Lambrechts , Elena Lega , Richard P. Nelson , Aurélien Crida , Alessandro Morbidelli

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

Celestial bodies with a mass of M ~ 10 M_Jup have been found orbiting nearby stars. It is unknown whether these objects formed like gas-giant planets through core accretion or like stars through gravitational instability. I show that…

Earth and Planetary Astrophysics · Physics 2018-02-07 Kevin C. Schlaufman

We extend the core-accretion model of giant gaseous planets by Pollack et al. (\cite{P96}) to include migration, disc evolution and gap formation. Starting with a core of a fraction of an Earth's mass located at 8 AU, we end our simulation…

Astrophysics · Physics 2009-11-10 Y. Alibert , C. Mordasini , W. Benz

Planets grow via the collisional accretion of small bodies in a protoplanetary disk. Such small bodies feel strong gas drag and their orbits are significantly affected by the gas flow and atmospheric structure around the planet. We…

Earth and Planetary Astrophysics · Physics 2021-08-24 Tatsuya Okamura , Hiroshi Kobayashi

The favored theoretical explanation for giant planet formation -- in both our solar system and others -- is the core accretion model (although it still has some serious difficulties). In this scenario, planetesimals accumulate to build up…

Astrophysics · Physics 2016-08-30 Gregory Laughlin , Peter Bodenheimer , Fred C. Adams

In the core accretion model, gas-giant planets first form a solid core, which then accretes gas from a protoplanetary disk when the core exceeds a critical mass. Here, we model the atmosphere of a core that grows by accreting ice-rich…

Earth and Planetary Astrophysics · Physics 2017-11-08 John Chambers

Observational evidence exists for the formation of gas giant planets on wide orbits around young stars by disk gravitational instability, but the roles of disk instability and core accretion for forming gas giants on shorter period orbits…

Earth and Planetary Astrophysics · Physics 2017-02-15 Alan P. Boss

Runaway growth ends when the largest protoplanets dominate the dynamics of the planetesimal disk; the subsequent self-limiting accretion mode is referred to as ``oligarchic growth.'' Here, we begin by expanding on the existing analytic…

Astrophysics · Physics 2009-11-07 Edward W. Thommes , Martin J. Duncan , Harold F. Levison

In the Solar System giant planets come in two flavours: 'gas giants' (Jupiter and Saturn) with massive gas envelopes and 'ice giants' (Uranus and Neptune) with much thinner envelopes around their cores. It is poorly understood how these two…

Earth and Planetary Astrophysics · Physics 2014-11-26 Michiel Lambrechts , Anders Johansen , Alessandro Morbidelli

There are two planetary formation scenarios: core accretion and gravitational disk instability. Based on the fact that gaseous objects are preferentially observed around metal-rich host stars, most extra-solar gaseous objects discovered to…

Earth and Planetary Astrophysics · Physics 2019-05-08 Shohei Goda , Taro Matsuo

(Abridged) We consider models of gas giant planets forming in protoplanetary disks consisting of solid cores with gaseous envelopes in contact with their critical Hill spheres while accreting gas from the surrounding disk.We suppose the…

Astrophysics · Physics 2009-11-10 John C. B. Papaloizou , Richard P. Nelson

We construct an analytic model for the rate of gas accretion onto a planet embedded in a protoplanetary disk as a function of planetary mass, disk viscosity, disk scale height, and unperturbed surface density in order to study the long-term…

Astrophysics · Physics 2009-06-23 T. Tanigawa , M. Ikoma

To understand giant planet formation, we need to focus on host stars close to $1.7\ \rm M_{\odot}$, where the occurrence rate of these planets is the highest. In this initial study, we carry out pebble-driven core accretion planet formation…

Earth and Planetary Astrophysics · Physics 2023-10-30 Heather Johnston , Olja Panic , Beibei Liu

In the core accretion model of giant planet formation, a solid protoplanetary core begins to accrete gas directly from the nebula when its mass reaches about 5 earth masses. The protoplanet has at most a few million years to reach runaway…

Earth and Planetary Astrophysics · Physics 2013-07-09 Jens Teiser , Sarah E. Dodson-Robinson

The Core Accretion model is widely accepted as the primary mechanism for forming planets up to a few Jupiter masses. However, the formation of super-massive planets remains a subject of debate, as their formation via the Core Accretion…

Earth and Planetary Astrophysics · Physics 2024-12-10 M. Nguyen , V. Adibekyan

We investigate gas accretion onto a protoplanet, by considering the thermal effect of gas in three-dimensional hydrodynamical simulations, in which the wide region from a protoplanetary gas disk to a Jovian radius planet is resolved using…

Solar and Stellar Astrophysics · Physics 2015-05-18 Masahiro N. Machida , Eiichiro Kokubo , Shu-ichiro Inutsuka , Tomoaki Matsumoto

The core-accretion model predicts that planetary cores as massive as super-Earths undergo runaway gas accretion to become gas giants. However, the exoplanet census revealed the prevalence of super-Earths close to their host stars, which…

Earth and Planetary Astrophysics · Physics 2018-11-14 Masahiro Ogihara , Yasunori Hori

Atmospheric chemical abundances of giant planets lead to important constraints on planetary formation and migration. Studies have shown that giant planets that migrate through the protoplanetary disk can accrete substantial amounts of…

Earth and Planetary Astrophysics · Physics 2017-06-28 Nikku Madhusudhan , Bertram Bitsch , Anders Johansen , Linn Eriksson

The apparent dependence of detection frequency of extrasolar planets on the metallicity of their host stars is investigated with Monte Carlo simulations using a deterministic core-accretion planet formation model. According to this model,…

Astrophysics · Physics 2017-10-18 S. Ida , D. N. C. Lin