J
Julien de Wit
Researcher at Massachusetts Institute of Technology
Publications - 80
Citations - 5861
Julien de Wit is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Exoplanet & Planet. The author has an hindex of 26, co-authored 57 publications receiving 5013 citations. Previous affiliations of Julien de Wit include University of Arizona & Max Planck Society.
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Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
Michaël Gillon,Amaury H. M. J. Triaud,Brice-Olivier Demory,Emmanuel Jehin,Eric Agol,Katherine M. Deck,Susan M. Lederer,Julien de Wit,Artem Burdanov,James G. Ingalls,Emeline Bolmont,Jérémy Leconte,Sean N. Raymond,Franck Selsis,Martin Turbet,Khalid Barkaoui,Adam J. Burgasser,Matthew R. Burleigh,Sean Carey,Aleksander Chaushev,Chris M. Copperwheat,Laetitia Delrez,Catarina S. Fernandes,Daniel Luke Holdsworth,Enrico J. Kotze,Valérie Van Grootel,Y. Almleaky,Zouhair Benkhaldoun,Pierre Magain,Didier Queloz +29 more
TL;DR: The observations reveal that at least seven planets with sizes and masses similar to those of Earth revolve around TRAPPIST-1, and the six inner planets form a near-resonant chain, such that their orbital periods are near-ratios of small integers.
Journal ArticleDOI
Temperate Earth-sized planets transiting a nearby ultracool dwarf star
Michaël Gillon,Emmanuel Jehin,Susan M. Lederer,Laetitia Delrez,Julien de Wit,Artem Burdanov,Valérie Van Grootel,Adam J. Burgasser,Amaury H. M. J. Triaud,Cyrielle Opitom,Brice-Olivier Demory,D. K. Sahu,Daniella C. Bardalez Gagliuffi,Pierre Magain,Didier Queloz +14 more
TL;DR: In this paper, the detection of three Earth-sized planets transiting a very nearby (12 parsec) ultracool dwarf star of only 8% of the mass of the Sun was reported.
Journal ArticleDOI
The nature of the TRAPPIST-1 exoplanets
Simon L. Grimm,Brice-Olivier Demory,Michaël Gillon,Caroline Dorn,Caroline Dorn,Eric Agol,Artem Burdanov,Laetitia Delrez,Marko Sestovic,Amaury H. M. J. Triaud,Amaury H. M. J. Triaud,Martin Turbet,Emeline Bolmont,Anthony Caldas,Julien de Wit,Emmanuel Jehin,Jérémy Leconte,Sean N. Raymond,Valérie Van Grootel,Adam J. Burgasser,Sean Carey,Daniel C. Fabrycky,Kevin Heng,David M. Hernandez,James G. Ingalls,Susan M. Lederer,Franck Selsis,Didier Queloz +27 more
TL;DR: In this article, the authors used a genetic algorithm coupled with a full N-body integrator to estimate the masses and densities of the TRAPPIST-1 exoplanets.
Journal ArticleDOI
Inference of Inhomogeneous Clouds in an Exoplanet Atmosphere
Brice-Olivier Demory,Julien de Wit,Nikole K. Lewis,Jonathan J. Fortney,Andras Zsom,Sara Seager,Heather A. Knutson,Kevin Heng,Nikku Madhusudhan,Michaël Gillon,Thomas Barclay,Jean-Michel Desert,Vivien Parmentier,Nicolas B. Cowan +13 more
TL;DR: In this article, the authors present new visible and infrared observations of the hot Jupiter Kepler-7b to determine its atmospheric properties and conclude that high altitude, optically reflective clouds located west from the substellar point are present in its atmosphere.
Journal ArticleDOI
A seven-planet resonant chain in TRAPPIST-1
Rodrigo Luger,Marko Sestovic,Ethan Kruse,Simon L. Grimm,Brice-Olivier Demory,Eric Agol,Emeline Bolmont,Daniel C. Fabrycky,Catarina Silva Fernandes,Valérie Van Grootel,Adam J. Burgasser,Michaël Gillon,James G. Ingalls,Emmanuel Jehin,Sean N. Raymond,Franck Selsis,Amaury H. M. J. Triaud,Thomas Barclay,Geert Barentsen,Steve B. Howell,Laetitia Delrez,Julien de Wit,Daniel Foreman-Mackey,Daniel Luke Holdsworth,Jérémy Leconte,Susan M. Lederer,Martin Turbet,Y. Almleaky,Zouhair Benkhaldoun,Pierre Magain,Brett M. Morris,Kevin Heng,Didier Queloz +32 more
TL;DR: The TRAPPIST-1 system is the first transiting planet system found orbiting an ultra-cool dwarf star as mentioned in this paper, which was unconstrained until now, and has a radius of 0.715 Earth radii and an equilibrium temperature of 169 K, placing it at the snow line.