Search Results - "Gillon, Michaël"
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Searching for red worlds
Published in Nature astronomy (01-04-2018)“…The SPECULOOS project aims to detect terrestrial exoplanets well suited for detailed atmospheric characterization, explains Principal Investigator Michaël…”
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Strong XUV irradiation of the Earth-sized exoplanets orbiting the ultracool dwarf TRAPPIST-1
Published in Monthly notices of the Royal Astronomical Society. Letters (01-02-2017)“…Abstract We present an XMM–Newton X-ray observation of TRAPPIST-1, which is an ultracool dwarf star recently discovered to host three transiting and temperate…”
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Variability in the super-Earth 55 Cnc e
Published in Monthly notices of the Royal Astronomical Society (01-01-2016)“…Considerable progress has been made in recent years in observations of atmospheric signatures of giant exoplanets, but processes in rocky exoplanets remain…”
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A novel SETI strategy targeting the solar focal regions of the most nearby stars
Published in Acta astronautica (01-02-2014)“…Many hypotheses have been raised to explain the famous Fermi paradox. One of them is that self-replicating probes could have explored the whole Galaxy,…”
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A rocky planet transiting a nearby low-mass star
Published in Nature (London) (12-11-2015)“…A low-mass star that is just 12 parsecs away from Earth is shown to be transited by an Earth-sized planet, GJ 1132b, which probably has a rock/iron composition…”
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Atmospheric reconnaissance of the habitable-zone Earth-sized planets orbiting TRAPPIST-1
Published in Nature astronomy (01-03-2018)“…Seven temperate Earth-sized exoplanets readily amenable for atmospheric studies transit the nearby ultracool dwarf star TRAPPIST-1 (refs 1 , 2 ). Their…”
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Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
Published in Nature (London) (23-02-2017)“…Last year, three Earth-sized planets were discovered to be orbiting the nearby Jupiter-sized star TRAPPIST-1; now, follow-up photometric observations from the…”
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Search for an Alien Message to a Nearby Star
Published in The Astronomical journal (01-11-2022)“…Abstract If alien probes have colonized the whole galaxy, they could have formed an efficient galactic-scale communication network by establishing direct…”
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Weather on Other Worlds. VI. Optical Spectrophotometry of Luhman 16B Reveals Large-amplitude Variations in the Alkali Lines
Published in The Astrophysical journal (01-10-2021)“…Abstract Using a novel wide-slit, multiobject approach with the GMOS spectrograph on the 8 m Gemini South telescope, we have obtained precise time-series…”
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First limits on the occurrence rate of short-period planets orbiting brown dwarfs
Published in Monthly notices of the Royal Astronomical Society (01-01-2017)“…Planet formation theories predict a large but still undetected population of short-period terrestrial planets orbiting brown dwarfs. Should specimens of this…”
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Two massive rocky planets transiting a K-dwarf 6.5 parsecs away
Published in Nature astronomy (02-03-2017)“…HD 219134 is a K-dwarf star at a distance of 6.5 parsecs around which several low-mass planets were recently discovered 1 , 2 . The Spitzer Space Telescope…”
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Refining the Transit-timing and Photometric Analysis of TRAPPIST-1: Masses, Radii, Densities, Dynamics, and Ephemerides
Published in The planetary science journal (22-01-2021)“…We have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years. We add to these ground-based, HST, and K2…”
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Colour–magnitude diagrams of transiting Exoplanets – II. A larger sample from photometric distances
Published in Monthly notices of the Royal Astronomical Society (11-10-2014)“…Colour–magnitude diagrams form a traditional way of presenting luminous objects in the Universe and compare them to each other. Here, we estimate the…”
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Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems
Published in The Astronomical journal (01-12-2023)“…Abstract The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that…”
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Probing the atmosphere of a sub-Jovian planet orbiting a cool dwarf
Published in Monthly notices of the Royal Astronomical Society (01-07-2017)“…We derive the 0.01 µm binned transmission spectrum, between 0.74 and 1.0 µm, of WASP-80b from low resolution spectra obtained with the FORS2 instrument…”
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TESS Hunt for Young and Maturing Exoplanets (THYME). X. A Two-planet System in the 210 Myr MELANGE-5 Association
Published in The Astronomical journal (01-07-2024)“…Abstract Young (<500 Myr) planets are critical to studying how planets form and evolve. Among these young planetary systems, multiplanet configurations are…”
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Potential Atmospheric Compositions of TRAPPIST-1 c Constrained by JWST/MIRI Observations at 15 μm
Published in Astrophysical journal. Letters (01-09-2023)“…Abstract The first James Webb Space Telescope observations of TRAPPIST-1 c showed a secondary eclipse depth of 421 ± 94 ppm at 15 μ m, which is consistent with…”
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Complex Modulation of Rapidly Rotating Young M Dwarfs: Adding Pieces to the Puzzle
Published in The Astronomical journal (01-04-2022)“…Abstract New sets of young M dwarfs with complex, sharp-peaked, and strictly periodic photometric modulations have recently been discovered with Kepler/K2…”
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WASP-80b has a dayside within the T-dwarf range
Published in Monthly notices of the Royal Astronomical Society (01-07-2015)“…WASP-80b is a missing link in the study of exoatmospheres. It falls between the warm Neptunes and the hot Jupiters and is amenable for characterization, thanks…”
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An eclipsing substellar binary in a young triple system discovered by SPECULOOS
Published in Nature astronomy (01-07-2020)“…Mass, radius and age are three of the most fundamental parameters for celestial objects, enabling insight into the evolution and internal physics of stars,…”
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