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The existence of planets born in environments highly perturbed by a stellar companion represents a major challenge to the paradigm of planet formation. In numerical simulations, the presence of a close binary companion stirs up the relative…

Earth and Planetary Astrophysics · Physics 2015-06-11 Stefano Meschiari

Several detections of wide-orbit planet-mass/sub-stellar companions around young solar-like stars were reported in the last decade. The origin of those possible planets is still unclear but accretion tracers and VLT/SPHERE observations…

Solar and Stellar Astrophysics · Physics 2019-04-03 Ch. Rab , I. Kamp , C. Ginski , N. Oberg , G. A. Muro-Arena , C. Dominik , L. B. F. M. Waters , W. -F. Thi , P. Woitke

Transition disks are protoplanetary disks with inner cavities possibly cleared by massive companions, which makes them prime targets to observe at high resolution to map their velocity structure. We present ALMA Band 6 dust and gas…

Detections of planets in eccentric, close (separations of ~20 AU) binary systems such as \alpha Cen or \gamma Cep provide an important test of planet formation theories. Gravitational perturbations from the companion are expected to excite…

Earth and Planetary Astrophysics · Physics 2016-08-31 Kedron Silsbee , Roman R. Rafikov

Observations of the youngest planets ($\sim$1-10 Myr for a transitional disk) will increase the accuracy of our planet formation models. Unfortunately, observations of such planets are challenging and time-consuming to undertake even in…

Earth and Planetary Astrophysics · Physics 2016-03-23 Jack Dobinson , Zoe M. Leinhardt , Stefan Lines , Philip J. Carter , Sarah E. Dodson-Robinson , Nick A. Teanby

The vertical thickness of debris discs is often used as a measure of these systems' dynamical excitation and as clues to the presence of hidden massive perturbers such as planetary embryos. However, this argument could be flawed because the…

Earth and Planetary Astrophysics · Physics 2015-05-13 Philippe Thebault

Radial and azimuthal features (such as disc offsets and eccentric rings) seen in high resolution images of debris discs, provide us with the unique opportunity of finding potential planetary companions which betray their presence by…

Earth and Planetary Astrophysics · Physics 2016-11-15 E. Thilliez , S. T. Maddison

(Abridged) A numerical model of a circumstellar debris disk is developed and applied to observations of the circumstellar dust orbiting beta Pictoris. The model accounts for the rates at which dust is produced by collisions among unseen…

Earth and Planetary Astrophysics · Physics 2015-05-19 Joseph M. Hahn

Radially compact protoplanetary discs (<=50 au) are ubiquitous in nearby star-forming regions. Multiple mechanisms have been invoked to interpret various compact discs. In this paper, we propose that fragmentation of fragile dust grains in…

Earth and Planetary Astrophysics · Physics 2025-02-10 Simin Tong , Richard Alexander

Debris discs consist of belts of bodies ranging in size from dust grains to planetesimals; these belts are visible markers of planetary systems around other stars that can reveal the influence of extrasolar planets through their shape and…

Earth and Planetary Astrophysics · Physics 2023-02-01 Marco A. Muñoz-Gutiérrez , Jonathan P. Marshall , Antonio Peimbert

We carry out three-dimensional hydrodynamical simulations to study planet-disc interactions for inclined high mass planets, focusing on the disc's secular evolution induced by the planet. We find that, when the planet is massive enough and…

Earth and Planetary Astrophysics · Physics 2018-12-19 Zhaohuan Zhu

Disc instability (DI) is a model aimed at explaining the formation of companions through the fragmentation of the circumstellar gas disc. Furthermore, DI could explain the formation of part of the observed exoplanetary population. We aim to…

Earth and Planetary Astrophysics · Physics 2026-01-14 O. Schib , C. Mordasini , A. Emsenhuber , R. Helled

Discs around young planets, so-called circumplanetary discs (CPDs), are essential for planet growth, satellite formation, and planet detection. We study the millimetre and centimetre emission from accreting CPDs by using the simple $\alpha$…

Earth and Planetary Astrophysics · Physics 2018-06-27 Zhaohuan Zhu , Sean M. Andrews , Andrea Isella

We introduce a new technique to determine the gas turbulence and surface density in bright disc rings, under the assumption that dust growth is limited by turbulent fragmentation at the ring centre. We benchmark this prescription in HD…

Earth and Planetary Astrophysics · Physics 2023-11-16 Francesco Zagaria , Cathie J. Clarke , Richard A. Booth , Stefano Facchini , Giovanni P. Rosotti

Following the assumption that the disc substructures observed in protoplanetary discs originate from the interaction between the disc and the forming planets embedded therein, we aim to test if these putative planets could represent the…

Earth and Planetary Astrophysics · Physics 2023-09-13 Anastasia Tzouvanou , Bertram Bitsch , Gabriele Pichierri

Young circumstellar disks are of prime interest to understand the physical and chemical conditions under which planet formation takes place. Only very few detections of planet candidates within these disks exist, and most of them are…

Earth and Planetary Astrophysics · Physics 2018-09-12 M. Keppler , M. Benisty , A. Müller , Th. Henning , R. van Boekel , F. Cantalloube , C. Ginski , R. G. van Holstein , A. -L. Maire , A. Pohl , M. Samland , H. Avenhaus , J. -L. Baudino , A. Boccaletti , J. de Boer , M. Bonnefoy , G. Chauvin , S. Desidera , M. Langlois , C. Lazzoni , G. Marleau , C. Mordasini , N. Pawellek , T. Stolker , A. Vigan , A. Zurlo , T. Birnstiel , W. Brandner , M. Feldt , M. Flock , J. Girard , R. Gratton , J. Hagelberg , A. Isella , M. Janson , A. Juhasz , J. Kemmer , Q. Kral , A. -M. Lagrange , R. Launhardt , A. Matter , F. Ménard , J. Milli , P. Mollière , J. Olofsson , L. Perez , P. Pinilla , C. Pinte , S. P. Quanz , T. Schmidt , S. Udry , Z. Wahhaj , J. P. Williams , E. Buenzli , M. Cudel , C. Dominik , R. Galicher , M. Kasper , J. Lannier , D. Mesa , D. Mouillet , S. Peretti , C. Perrot , G. Salter , E. Sissa , F. Wildi , L. Abe , J. Antichi , J. -C. Augereau , A. Baruffolo , P. Baudoz , A. Bazzon , J. -L. Beuzit , P. Blanchard , S. S. Brems , T. Buey , V. De Caprio , M. Carbillet , M. Carle , E. Cascone , A. Cheetham , R. Claudi , A. Costille , A. Delboulbé , K. Dohlen , D. Fantinel , P. Feautrier , T. Fusco , E. Giro , D. Gisler , L. Gluck , C. Gry , N. Hubin , E. Hugot , M. Jaquet , D. Le Mignant , M. Llored , F. Madec , Y. Magnard , P. Martinez , D. Maurel , M. Meyer , O. Moeller-Nilsson , T. Moulin , L. Mugnier , A. Origne , A. Pavlov , D. Perret , C. Petit , J. Pragt , P. Puget , P. Rabou , J. Ramos , F. Rigal , S. Rochat , R. Roelfsema , G. Rousset , A. Roux , B. Salasnich , J. -F. Sauvage , A. Sevin , C. Soenke , E. Stadler , M. Suarez , M. Turatto , L. Weber

Gas giant planets are expected to accrete most of their mass via a circumplanetary disk. If the planet is unmagnetized and initially slowly rotating, it will accrete gas via a radially narrow boundary layer and rapidly spin up. Radial…

Earth and Planetary Astrophysics · Physics 2021-11-17 Jiayin Dong , Yan-Fei Jiang , Phil Armitage

Debris disks are the dust disks found around ~20% of nearby main sequence stars in far-IR surveys. They can be considered as descendants of protoplanetary disks or components of planetary systems, providing valuable information on…

Earth and Planetary Astrophysics · Physics 2018-12-05 Mark C. Wyatt

We applied the global end-to-end model described in Paper~I of this series to perform a population synthesis of companions formed via disc instability (DI). By using initial conditions compatible with both observations and hydrodynamical…

Earth and Planetary Astrophysics · Physics 2026-01-14 O. Schib , C. Mordasini , A. Emsenhuber , R. Helled

With about 700 confirmed extrasolar planets, it is time to move beyond discovery and towards characterization. Perhaps the most basic parameter of an extrasolar planet is its mass; however, this is very difficult to determine if the planet…

Earth and Planetary Astrophysics · Physics 2015-06-16 Kevin Gullikson , Michael Endl
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