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We present a new model of giant planet formation that extends the core-accretion model of Pollack etal (1996) to include migration, disc evolution and gap formation. We show that taking into account these effects can lead to a much more…

Astrophysics · Physics 2011-05-05 Yann Alibert , Christoph Mordasini , Willy Benz , Christophe Winisdoerffer

Prevailing $N$-body planet formation models typically start with lunar-mass embryos and show a general trend of rapid migration of massive planetary cores to the inner Solar System in the absence of a migration trap. This setup cannot…

Earth and Planetary Astrophysics · Physics 2024-03-27 Tommy Chi Ho Lau , Man Hoi Lee , Ramon Brasser , Soko Matsumura

Context. Planet formation with pebbles has been proposed to solve a couple of long-standing issues in the classical formation model. Some sophisticated simulations have been done to confirm the efficiency of pebble accretion. However, there…

Earth and Planetary Astrophysics · Physics 2017-11-29 Soko Matsumura , Ramon Brasser , Shigeru Ida

The Hertzsprung-Russell diagram (HRD) is central to stellar astrophysics but has rarely been used to interpret planet formation. We extend the HRD concept to forming planets and study how solid and gas accretion, cooling/contraction, and…

Earth and Planetary Astrophysics · Physics 2026-05-20 Benedikt Gottstein , Gabriel-Dominique Marleau , Christoph Mordasini

The planetary population synthesis method aims at comprehensively testing planet formation theories against observational evidence and providing theoretical sets of planets to help interpret observations and inform instrument development.…

Earth and Planetary Astrophysics · Physics 2024-10-02 Remo Burn , Christoph Mordasini

The population of exoplanetary systems detected by Kepler provides opportunities to refine our understanding of planet formation. Unraveling the conditions needed to produce the observed exoplanets will sallow us to make informed…

Earth and Planetary Astrophysics · Physics 2020-07-15 Gijs D. Mulders , David P. O'Brien , Fred J. Ciesla , Daniel Apai , Ilaria Pascucci

The dust-to-gas ratio in the protoplanetary disk, which is likely imprinted into the host star metallicity, is a property that plays a crucial role during planet formation. We aim at constraining planet formation and evolution processes by…

Earth and Planetary Astrophysics · Physics 2025-09-10 Di-Chang Chen , Christoph Mordasini , Alexandre Emsenhuber , Remo Burn , Ji-Wei Xie , Ji-Lin Zhou

Models of planet formation are built on underlying physical processes. In order to make sense of the origin of the planets we must first understand the origin of their building blocks. This review comes in two parts. The first part presents…

Earth and Planetary Astrophysics · Physics 2022-03-14 Sean N. Raymond , Alessandro Morbidelli

Global models of planet formation tend to begin with an initial set of planetary embryos for the sake simplicity. While this approach gives valuable insights on the evolution of the initial embryos, the initial distribution itself is a bold…

Earth and Planetary Astrophysics · Physics 2022-10-26 Oliver Voelkel , Hubert Klahr , Christoph Mordasini , Alexandre Emsenhuber

We present a review of the standard paradigm for giant planet formation, the core accretion theory. After an overview of the basic concepts of this model, results of the original implementation are discussed. Then, recent improvements and…

Astrophysics · Physics 2007-10-31 Christoph Mordasini , Yann Alibert , Willy Benz , Dominique Naef

We present a new numerical framework to model the formation and evolution of giant planets. The code is based on the further development of the stellar evolution toolkit Modules for Experiments in Stellar Astrophysics (MESA). The model…

Earth and Planetary Astrophysics · Physics 2021-09-10 Claudio Valletta , Ravit Helled

Newly-formed planetary systems with ages of <10 Myr offer many unique insights into the formation, evolution, and fundamental properties of extrasolar planets. These planets have fallen beyond the limits of past surveys, but as we enter the…

Earth and Planetary Astrophysics · Physics 2009-02-19 Adam L. Kraus , Kevin Covey , Michael Liu , Stanimir Metchev , Russel White , Lisa Prato , Doug Lin , Mark Marley

One of the main scenarios of planet formation is the core accretion model where a massive core forms first and then accretes a gaseous envelope. This core forms by accreting solids, either planetesimals, or pebbles. A key constraint in this…

Earth and Planetary Astrophysics · Physics 2018-11-21 Natacha Brügger , Yann Alibert , Sareh Ataiee , Willy Benz

The physics of planet formation is investigated using a population synthesis approach. We develop a simple model for planetary growth including pebble and gas accretion, and orbital migration in an evolving protoplanetary disk. The model is…

Earth and Planetary Astrophysics · Physics 2018-10-10 John Chambers

The large number of detected giant exoplanets offers the opportunity to improve our understanding of the formation mechanism, evolution, and interior structure of gas giant planets. The two main models for giant planet formation are core…

Numerous circumbinary planets have been discovered in surveys of transiting planets. Often, these planets are found to orbit near to the zone of dynamical instability, close to the central binary. The existence of these planets has been…

Earth and Planetary Astrophysics · Physics 2023-03-29 Gavin A. L. Coleman , Richard P. Nelson , Amaury H. M. J. Triaud

Gas giant planets play a fundamental role in shaping the orbital architecture of planetary systems and in affecting the delivery of volatile materials to terrestrial planets in the habitable zones. Current theories of gas giant planet…

Earth and Planetary Astrophysics · Physics 2010-06-30 Gennaro D'Angelo , Richard H. Durisen , Jack J. Lissauer

Several circumbinary planets have been detected by the Kepler mission. Recent work has emphasized the difficulty of forming these planets at their observed locations. It has been suggested that these planets formed further out in their…

Earth and Planetary Astrophysics · Physics 2015-06-16 Arnaud Pierens , 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

NASA's Kepler mission discovered $\sim700$ planets in multi-planet systems containing 3 or more transiting bodies, many of which are super-Earths and mini-Neptunes in compact configurations. Using $N$-body simulations, we examine the in…

Earth and Planetary Astrophysics · Physics 2020-01-08 Sanson T. S. Poon , Richard P. Nelson , Seth A. Jacobson , Alessandro Morbidelli