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Rapid inward migration of planets formed by gravitational instability
The observation of massive exoplanets at large separation (10 au) from their host star, like in the HR 8799 system, challenges theories of planet formation. A possible formation mechanism involvesExpand
Treating gravity in thin-disk simulations
In 2D simulations of thin gaseous disks with embedded planets or self-gravity the gravitational potential needs to be smoothed to avoid singularities in the numerical evaluation of the gravitationalExpand
On the convergence of the critical cooling time-scale for the fragmentation of self-gravitating discs
We carry out simulations of gravitationally unstable discs using a smoothed particle hydrodynamics (SPH) code and a grid-based hydrodynamics code, fargo, to understand the previous non-convergentExpand
FROM DUST TO PLANETESIMALS: AN IMPROVED MODEL FOR COLLISIONAL GROWTH IN PROTOPLANETARY DISKS
Planet formation occurs within the gas- and dust-rich environments of protoplanetary disks. Observations of these objects show that the growth of primordial submicron-sized particles into largerExpand
Small vs. large dust grains in transitional disks: do different cavity sizes indicate a planet? - SAO 206462 (HD 135344B) in polarized light with VLT/NACO
Context. Transitional disks represent a short stage of the evolution of circumstellar material. Studies of dust grains in these objects can provide pivotal information on the mechanisms of planetExpand
Discovery of a Companion Candidate in the HD 169142 Transition Disk and the Possibility of Multiple Planet Formation
We present L'- and J-band high-contrast observations of HD 169142, obtained with the Very Large Telescope/NACO AGPM vector vortex coronagraph and the Gemini Planet Imager, respectively. A sourceExpand
Growth and fragmentation of centimetre-sized dust aggregates: the dependence on aggregate size and porosity
We carry out three-dimensional smoothed particle hydrodynamics simulations of spherical homogeneous SiO 2 dust aggregates to investigate how the mass and the porosity of the aggregates affect theirExpand
RESOLVED IMAGES OF THE PROTOPLANETARY DISK AROUND HD 100546 WITH ALMA
The disk around the Herbig Ae/Be star HD 100546 has been extensively studied and it is one of the systems for which there are observational indications of ongoing and/or recent planet formation.Expand
A planetesimal orbiting within the debris disc around a white dwarf star
TLDR
A stable 123.4-minute periodic variation in the strength and shape of the Ca ii emission line profiles originating from the debris disc around the white dwarf SDSS J122859.93+104032 is interpreted as the signature of a solid-body planetesimal held together by its internal strength. Expand
High-resolution millimeter imaging of the CI Tau protoplanetary disk: a massive ensemble of protoplanets from 0.1 to 100 au
We present high-resolution millimeter continuum imaging of the disk surrounding the young star CI Tau, a system hosting the first hot Jupiter candidate in a protoplanetary disk system. The system hasExpand
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