LUGER, Rodrigo; SESTOVIC, Marko; KRUSE, Ethan; GRIMM, Simon L.; DEMORY, Brice-Olivier; AGOL, Eric; BOLMONT, Emeline; FABRYCKY, Daniel; FERNANDES, Catarina S.; VAN GROOTEL, Valérie; BURGASSER, Adam; GILLON, Michaël; INGALLS, James G.; JEHIN, Emmanuël; RAYMOND, Sean N.; SELSIS, Franck; TRIAUD, Amaury H. M. J.; BARCLAY, Thomas; BARENTSEN, Geert; HOWELL, Steve B.; DELREZ, Laetitia; DE WIT, Julien; FOREMAN-MACKEY, Daniel; HOLDSWORTH, Daniel L.; LECONTE, J.; LEDERER, Susan; TURBET, Martin; ALMLEAKY, Yaseen; BENKHALDOUN, Zouhair; MAGAIN, Pierre; MORRIS, Brett M.; HENG, Kevin; QUELOZ, Didier

doi:10.1038/s41550-017-0129

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LUGER, Rodrigo
University of Washington [Seattle]
NASA Astrobiology Institute [NAI]

SESTOVIC, Marko
Universität Bern = University of Bern = Université de Berne [UNIBE]

KRUSE, Ethan
University of Washington [Seattle]

LUGER, Rodrigo
University of Washington [Seattle]
NASA Astrobiology Institute [NAI]

SESTOVIC, Marko
Universität Bern = University of Bern = Université de Berne [UNIBE]

KRUSE, Ethan
University of Washington [Seattle]

GRIMM, Simon L.
Universität Bern = University of Bern = Université de Berne [UNIBE]

DEMORY, Brice-Olivier
Universität Bern = University of Bern = Université de Berne [UNIBE]

AGOL, Eric
University of Washington [Seattle]
NASA Astrobiology Institute [NAI]

BOLMONT, Emeline
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]

FABRYCKY, Daniel
University of Chicago

FERNANDES, Catarina S.
Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich [ULiège]

VAN GROOTEL, Valérie
Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich [ULiège]

BURGASSER, Adam
Center for Astrophysics and Space Sciences [La Jolla] [CASS]

GILLON, Michaël
Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich [ULiège]

INGALLS, James G.
Infrared Processing and Analysis Center [IPAC]

JEHIN, Emmanuël
Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich [ULiège]

RAYMOND, Sean N.
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
ECLIPSE 2017

SELSIS, Franck
ECLIPSE 2017
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]

TRIAUD, Amaury H. M. J.
Institute of Astronomy [Cambridge]

BARCLAY, Thomas
NASA Ames Research Center Cooperative for Research in Earth Science in Technology [ARC-CREST]
Bay Area Environmental Research Institute [BAER]

BARENTSEN, Geert
NASA Ames Research Center Cooperative for Research in Earth Science in Technology [ARC-CREST]
Bay Area Environmental Research Institute [BAER]

HOWELL, Steve B.
NASA Ames Research Center Cooperative for Research in Earth Science in Technology [ARC-CREST]

DELREZ, Laetitia
Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich [ULiège]
Cavendish Laboratory

DE WIT, Julien
Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge] [EAPS]

FOREMAN-MACKEY, Daniel
University of Washington [Seattle]

HOLDSWORTH, Daniel L.
Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy [Preston]

LECONTE, J.
ECLIPSE 2017
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]

LEDERER, Susan
NASA Johnson Space Center [JSC]

TURBET, Martin
Laboratoire de Météorologie Dynamique (UMR 8539) [LMD]

ALMLEAKY, Yaseen
King Abdulaziz University

BENKHALDOUN, Zouhair
Université Cadi Ayyad [Marrakech] [UCA]

MAGAIN, Pierre
Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich [ULiège]

MORRIS, Brett M.
University of Washington [Seattle]

HENG, Kevin
Universität Bern = University of Bern = Université de Berne [UNIBE]

QUELOZ, Didier
Observatoire Astronomique de l'Université de Genève [ObsGE]
Cavendish Laboratory

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Langue

Article de revue

Ce document a été publié dans

Nature Astronomy. 2017, vol. 1, p. 0129

Nature Publishing Group

Résumé en anglais

The TRAPPIST-1 system is the first transiting planet system found orbiting an ultra-cool dwarf star. At least seven planets similar to Earth in radius and in mass were previously found to transit this host star. Subsequently, TRAPPIST-1 was observed as part of the K2 mission and, with these new data, we report the measurement of an 18.764 d orbital period for the outermost planet, TRAPPIST-1h, which was unconstrained until now. This value matches our theoretical expectations based on Laplace relations and places TRAPPIST-1h as the seventh member of a complex chain, with three-body resonances linking every member. We find that TRAPPIST-1h has a radius of 0.715 Earth radii and an equilibrium temperature of 169 K, placing it at the snow line. We have also measured the rotational period of the star at 3.3 d and detected a number of flares consistent with an active, middle-aged, late M dwarf.< Réduire

Mots clés en anglais

Astrophysics - Solar and Stellar Astrophysics

Astrophysics - Instrumentation and Methods for Astrophysics

Astrophysics - Earth and Planetary Astrophysics

DOI

http://dx.doi.org/10.1038/s41550-017-0129

Projet Européen

Stars: dynamical Processes driving tidal Interactions, Rotation and Evolution
SPECULOOS: searching for habitable planets amenable for biosignatures detection around the nearest ultra-cool stars

Project ANR

Modélisation du processus de croissance des planètes Joviennes/

Origine

Importé de hal

Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804