Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
BOLMONT, Emeline
Namur Center for Complex Systems [Namur] [NaXys]
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
Namur Center for Complex Systems [Namur] [NaXys]
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
FERNANDES, Catarina S.
Portuguese Hydrographic Institute
Institut d'Astrophysique et de Géophysique [Liège]
< Reduce
Portuguese Hydrographic Institute
Institut d'Astrophysique et de Géophysique [Liège]
Language
en
Article de revue
This item was published in
Nature. 2017-02-22, vol. 542, n° 7642, p. 456 - 460
Nature Publishing Group
English Abstract
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 ...Read more >
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.Read less <
European Project
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
Stars: dynamical Processes driving tidal Interactions, Rotation and Evolution
Modular Joints for Aircraft Composite Structures
ANR Project
Modélisation du processus de croissance des planètes Joviennes/
Origin
Hal imported