Publications (13)
A search for rocky planets transiting brown dwarfs
Amaury H. M. J. Triaud, Michael Gillon, Franck Selsis +18
Exoplanetary science has reached a historic moment. The James Webb Space Telescope will be capable of probing the atmospheres of rocky planets, and perhaps even search for biologic…
Disruption of co-orbital (1:1) planetary resonances during gas-driven orbital migration
Arnaud Pierens, Sean Raymond
Planets close to their stars are thought to form farther out and migrate inward due to angular momentum exchange with gaseous protoplanetary disks. This process can produce systems…
Cataclysmic Variables from SDSS II. The Second Year
Paula Szkody, Oliver Fraser, Nicole Silvestri +18
The first full year of operation following the commissioning year of the Sloan Digital Sky Survey has revealed a wide variety of newly discovered cataclysmic variables. We show the…
Vortex instabilities triggered by low-mass planets in pebble-rich, inviscid protoplanetary discs
Arnaud Pierens, Min-Kai Lin, Sean Raymond
In the innermost regions of protoplanerary discs, the solid-to-gas ratio can be increased considerably by a number of processes, including photoevaporative and particle drift. MHD…
Making giant planet cores: convergent migration and growth of planetary embryos in non-isothermal discs
Arnaud Pierens, Christophe Cossou, Sean Raymond
Earth-mass bodies are expected to undergo Type I migration directed either inward or outward depending on the thermodynamical state of the protoplanetary disc. Zones of convergent…
Convergence zones for Type I migration: an inward shift for multiple planet systems
Christophe Cossou, Sean Raymond, Arnaud Pierens
Earth-mass planets embedded in gaseous protoplanetary disks undergo Type I orbital migration. In radiative disks an additional component of the corotation torque scaling with the e…
Migration of accreting planets in radiative discs from dynamical torques
Arnaud Pierens, Sean Raymond
We present the results of hydrodynamical simulations of the orbital evolution of planets undergoing runaway gas accretion in radiative discs. We consider accreting disc models with…
High precision astrometry mission for the detection and characterization of nearby habitable planetary systems with the Nearby Earth Astrometric Telescope (NEAT)
Fabien Malbet, Alain Léger, Michael Shao +49
(abridged) A complete census of planetary systems around a volume-limited sample of solar-type stars (FGK dwarfs) in the Solar neighborhood with uniform sensitivity down to Earth-m…
Planet Formation Imager (PFI): science vision and key requirements
Stefan Kraus, John D. Monnier, Michael J. Ireland +75
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…
The short-lived production of exozodiacal dust in the aftermath of a dynamical instability in planetary systems
Amy Bonsor, Sean Raymond, Jean-Charles Augereau
Excess emission, associated with warm, dust belts, commonly known as exozodis, has been observed around a third of nearby stars. The high levels of dust required to explain the obs…
Terrestrial and Habitable Planet Formation in Binary and Multi-star Systems
Nader Haghighipour, Steinn Sigurdsson, Jack Lissauer +1
One of the most surprising discoveries of extrasolar planets is the detection of planets in moderately close binary star systems. The Jovian-type planets in the two binaries of Gam…
Outward migration of Jupiter and Saturn in 3:2 or 2:1 resonance in radiative disks: implications for the Grand Tack and Nice models
Arnaud Pierens, Sean Raymond, David Nesvorny +1
Embedded in the gaseous protoplanetary disk, Jupiter and Saturn naturally become trapped in 3:2 resonance and migrate outward. This serves as the basis of the Grand Tack model. How…
New Worlds on the Horizon: Earth-Sized Planets Close to Other Stars
Eric Gaidos, Nader Haghighipour, Eric Agol +3
The search for habitable planets like Earth around other stars fulfils an ancient imperative to understand our origins and place in the cosmos. The past decade has seen the discove…