GILLON, Michaël; TRIAUD, Amaury H. M. J.; DEMORY, Brice-Olivier; JEHIN, Emmanuël; AGOL, Eric; DECK, Katherine M.; LEDERER, Susan M.; DE WIT, Julien; BURDANOV, Artem; INGALLS, James G.; BOLMONT, Emeline; LECONTE, J.; RAYMOND, Sean N.; SELSIS, Franck; TURBET, Martin; BARKAOUI, Khalid; BURGASSER, Adam; BURLEIGH, Matthew R.; CAREY, Sean J.; CHAUSHEV, Aleksander; COPPERWHEAT, Chris M.; DELREZ, Laetitia; FERNANDES, Catarina S.; HOLDSWORTH, Daniel L.; KOTZE, Enrico J.; VAN GROOTEL, Valérie; ALMLEAKY, Yaseen; BENKHALDOUN, Zouhair; MAGAIN, Pierre; QUELOZ, Didier

doi:10.1038/nature21360

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GILLON, Michaël
Institut d'Astrophysique et de Géophysique [Liège]

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

DEMORY, Brice-Olivier
Center for Space and Habitability [CSH]
Cavendish Laboratory

GILLON, Michaël
Institut d'Astrophysique et de Géophysique [Liège]

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

DEMORY, Brice-Olivier
Center for Space and Habitability [CSH]
Cavendish Laboratory

JEHIN, Emmanuël
Institut d'Astrophysique et de Géophysique [Liège]

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

DECK, Katherine M.
Caltech Department of Astronomy [Pasadena]

LEDERER, Susan M.
NASA Johnson Space Center [JSC]

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

BURDANOV, Artem
Institut d'Astrophysique et de Géophysique [Liège]

INGALLS, James G.
Spitzer Science Center

BOLMONT, Emeline
Namur Center for Complex Systems [Namur] [NaXys]
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]

LECONTE, J.
ECLIPSE 2017

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

SELSIS, Franck
ECLIPSE 2017

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

BARKAOUI, Khalid
Université Cadi Ayyad [Marrakech] [UCA]

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

BURLEIGH, Matthew R.
Department of Physics and Astronomy [Leicester]

CAREY, Sean J.
Spitzer Science Center

CHAUSHEV, Aleksander
Department of Physics and Astronomy [Leicester]

COPPERWHEAT, Chris M.
Astrophysics Research Institute [Liverpool] [ARI]

DELREZ, Laetitia
Institut d'Astrophysique et de Géophysique [Liège]
Cavendish Laboratory

FERNANDES, Catarina S.
Portuguese Hydrographic Institute
Institut d'Astrophysique et de Géophysique [Liège]

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

KOTZE, Enrico J.
South African Astronomical Observatory [SAAO]

VAN GROOTEL, Valérie
Institut d'Astrophysique et de Géophysique [Liège]

ALMLEAKY, Yaseen
Faculty of Science [Saudi Arabia]

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

MAGAIN, Pierre
Institut d'Astrophysique et de Géophysique [Liège]

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

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Ce document a été publié dans

Nature. 2017-02-22, vol. 542, n° 7642, p. 456 - 460

Nature Publishing Group

Résumé en anglais

One aim of modern astronomy is to detect temperate, Earth-like exoplanets that are well suited for atmospheric characterization. Recently, three Earth-sized planets were detected that transit (that is, pass in front of) a star with a mass just eight per cent that of the Sun, located 12 parsecs away. The transiting configuration of these planets, combined with the Jupiter-like size of their host star—named TRAPPIST-1—makes possible in-depth studies of their atmospheric properties with present-day and future astronomical facilities. Here we report the results of a photometric monitoring campaign of that star from the ground and space. Our observations reveal that at least seven planets with sizes and masses similar to those of Earth revolve around TRAPPIST-1. The six inner planets form a near-resonant chain, such that their orbital periods (1.51, 2.42, 4.04, 6.06, 9.1 and 12.35 days) are near-ratios of small integers. This architecture suggests that the planets formed farther from the star and migrated inwards. Moreover, the seven planets have equilibrium temperatures low enough to make possible the presence of liquid water on their surfaces.< Réduire

DOI

http://dx.doi.org/10.1038/nature21360

Projet Européen

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

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