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Millimeter sized dust grains experience radial velocities exceeding the gas velocities by orders of magnitude. The viscous evolution of the accretion disk adds disk material onto the central star's convective envelope, influencing its…

Earth and Planetary Astrophysics · Physics 2023-08-15 León-Alexander Hühn , Bertram Bitsch

We present a new analytic approach to the disk-planet interaction that is especially useful for planets with eccentricity larger than the disk aspect ratio. We make use of the dynamical friction formula to calculate the force exerted on the…

Earth and Planetary Astrophysics · Physics 2015-05-28 Takayuki Muto , Taku Takeuchi , Shigeru Ida

We review the current theoretical understanding how growth from micro-meter sized dust to massive giant planets occurs in disks around young stars. After introducing a number of observational constraints from the solar system, from observed…

Earth and Planetary Astrophysics · Physics 2010-12-24 Christoph Mordasini , Hubert Klahr , Yann Alibert , Willy Benz , Kai-Martin Dittkrist

In this paper, we calculate simulated scattered light images of a circumstellar disk in which a planet is forming by gravitational instability. The simulated images bear no correlation to the vertically integrated surface density of the…

Astrophysics · Physics 2009-11-13 Hannah Jang-Condell , Alan P. Boss

We study a solid protoplanetary core of 1-10 earth masses migrating through a disk. We suppose the core luminosity is generated as a result of planetesimal accretion and calculate the structure of the gaseous envelope assuming equilibrium.…

Astrophysics · Physics 2009-10-31 J. Papaloizou , C. Terquem

In this review paper, we aim at providing a global outlook on the progresses made in the recent years to characterize the role of magnetic fields during the embedded phases of the star formation process. Thanks to the development of…

Astrophysics of Galaxies · Physics 2022-09-07 Anaëlle Maury , Patrick Hennebelle , Josep Miquel Girart

Recent ALMA observations on disk substructures suggest the presence of embedded protoplanets in a large number disks. The primordial configurations of these planetary systems can be deduced from the morphology of the disk substructure and…

Earth and Planetary Astrophysics · Physics 2022-06-22 Shijie Wang , Kazuhiro D. Kanagawa , Yasushi Suto

We explore planet formation in binary systems around the central star where the protoplanetary disk plane is highly inclined with respect to the companion star orbit. This might be the most frequent scenario for binary separations larger…

Earth and Planetary Astrophysics · Physics 2015-05-13 F. Marzari , P. Thebault , H. Scholl

While it is widely accepted that planets are formed in protoplanetary disks, there is still much debate on when this process happens. In a few cases protoplanets have been directly imaged, but for the vast majority of systems, disk gaps and…

Earth and Planetary Astrophysics · Physics 2020-11-25 Felipe O. Alves , L. Ilsedore Cleeves , Josep M. Girart , Zhaohuan Zhu , Gabriel A. P. Franco , Alice Zurlo , Paola Caselli

Over the past decade, progress in observational capabilities, combined with theoretical advancements, have transformed our comprehension of the physics and chemistry during planet formation. Despite these important steps forward, open…

Solar and Stellar Astrophysics · Physics 2024-07-08 G. Perotti , L. Cacciapuoti , N. -D. Tung , T. Grassi , E. Schisano , L. Testi

In this review we re-evaluate our observational and theoretical understanding of the chemical evolution of protoplanetary disks. We discuss how improved observational capabilities have enabled the detection of numerous molecules exposing an…

Astrophysics · Physics 2007-05-23 E. A. Bergin , Y. Aikawa , G. A. Blake , E. F. van Dishoeck

The Planet Formation Imager (PFI) project aims to provide a strong scientific vision for ground-based optical astronomy beyond the upcoming generation of Extremely Large Telescopes. We make the case that a breakthrough in angular resolution…

The interaction between a planet located in the inner region of a disc and the warped outer region is studied. We consider the stage of evolution after the planet has cleared-out a gap, so that the planetary orbit evolves only under the…

Earth and Planetary Astrophysics · Physics 2015-06-17 Caroline Terquem

Protoplanetary disks dissipate rapidly after the central star forms, on time-scales comparable to those inferred for planet formation. In order to allow the formation of planets, disks must survive the dispersive effects of UV and X-ray…

Earth and Planetary Astrophysics · Physics 2019-01-24 U. Gorti , R. Liseau , Zs. Sandor , C. Clarke

Population synthesis models of planetary systems developed during the last $\sim$15 years could reproduce several of the observables of the exoplanet population, and also allowed to constrain planetary formation models. We present our…

Earth and Planetary Astrophysics · Physics 2017-08-16 M. P. Ronco , O. M. Guilera , G. C. de Elía

With hundreds of exoplanets detected, it is necessary to revisit giant planets accretion models to explain their mass distribution. In particular, formation of sub-jovian planets remains unclear, given the short timescale for the runaway…

Earth and Planetary Astrophysics · Physics 2015-06-12 Guillaume Rivier , Aurélien Crida , Alessandro Morbidelli , Yann Brouet

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

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

Planets embedded in optically thick passive accretion disks are expected to produce perturbations in the density and temperature structure of the disk. We calculate the magnitudes of these perturbations for a range of planet masses and…

Astrophysics · Physics 2009-11-13 H. Jang-Condell

While recent observational progress is converging on the detection of compact regions of thermal emission due to embedded protoplanets, further theoretical predictions are needed to understand the response of a protoplanetary disk to the…

Earth and Planetary Astrophysics · Physics 2015-07-27 Matias Montesinos , Jorge Cuadra , Sebastian Perez , Clement Baruteau , Simon Casassus