On the Age of the TRAPPIST-1 System
@article{Burgasser2017OnTA, title={On the Age of the TRAPPIST-1 System}, author={Adam J. Burgasser and Eric E. Mamajek}, journal={arXiv: Solar and Stellar Astrophysics}, year={2017} }
The nearby (d = 12 pc) M8 dwarf star TRAPPIST-1 (2MASS J23062928-0502285) hosts a compact system of at least seven exoplanets with sizes similar to Earth. Given its importance for testing planet formation and evolution theories, and for assessing the prospects for habitability among Earth-size exoplanets orbiting the most common type of star in the Galaxy, we present a comprehensive assessment of the age of this system. We collate empirical age constraints based on the color-absolute magnitude…
67 Citations
Activity of the M8 Dwarf TRAPPIST-1
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The results of an analysis of observations of the cool (M8) dwarf TRAPPIST-1 obtained on the Kepler Space Telescope (the K2 continuation mission) are presented. TRAPPIST-1 possesses a planetary…
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We present the distance-calibrated spectral energy distribution (SED) of TRAPPIST-1 using a new medium resolution (R~6000) near-infrared FIRE spectrum and its Gaia parallax. We report an updated…
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The TRAPPIST-1 planetary system consists of seven planets within 0.05 au of each other, five of which are in a multiresonant chain. These resonances suggest the system formed via planet migration;…
Disentangling the Planet from the Star in Late-Type M Dwarfs: A Case Study of TRAPPIST-1g
- Physics, GeologyThe Astronomical Journal
- 2018
The atmospheres of late M stars represent a significant challenge in the characterization of any transiting exoplanets due to the presence of strong molecular features in the stellar atmosphere.…
A Review of Possible Planetary Atmospheres in the TRAPPIST-1 System
- Physics, GeologySpace science reviews
- 2020
It is shown that (i) Hubble Space Telescope transit observations, (ii) bulk density measurements comparison with H2-rich planets mass-radius relationships, (iii) atmospheric escape modelling, and (iv) gas accretion modelling altogether offer solid evidence against the presence of hydrogen-dominated—cloud-free and cloudy—atmospheres around TRAPPIST-1 planets.
The Stellar Activity of TRAPPIST-1 and Consequences for the Planetary Atmospheres
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The signatures of planets hosted by M dwarfs are more readily detected with transit photometry and radial velocity methods than those of planets around larger stars. Recently, transit photometry was…
Constraining the Radio Emission of TRAPPIST-1
- Physics, GeologyThe Astrophysical Journal
- 2019
TRAPPIST-1 is an ultracool dwarf (UCD) with a system of 7 terrestrial planets, at least three of which orbit in the habitable zone. The radio emission of such low-mass stars is poorly understood; few…
Planet-Planet Occultations in TRAPPIST-1 and Other Exoplanet Systems
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We explore the occurrence and detectability of planet-planet occultations (PPOs) in exoplanet systems. These are events during which a planet occults the disk of another planet in the same system,…
A Deep Radio Limit for the TRAPPIST-1 System
- Physics, GeologyThe Astrophysical Journal
- 2018
The first nearby very-low-mass star–planet-host discovered, TRAPPIST-1, presents not only a unique opportunity for studying a system of multiple terrestrial planets, but a means to probe…
References
SHOWING 1-10 OF 108 REFERENCES
Reconnaissance of the TRAPPIST-1 exoplanet system in the Lyman-α line
- Physics, Geology
- 2017
The TRAPPIST-1 system offers the opportunity to characterize terrestrial, potentially habitable planets orbiting a nearby ultracool dwarf star. We performed a four-orbit reconnaissance with the Space…
A combined transmission spectrum of the Earth-sized exoplanets TRAPPIST-1 b and c
- Physics, GeologyNature
- 2016
Observations of the combined transmission spectrum of the two inner planets during their simultaneous transits on 4 May 2016 rule out cloud-free hydrogen-dominated atmospheres for each planet at ≥10σ levels; TRAPPIST-1 b and c are therefore unlikely to have an extended gas envelope as they occupy a region of parameter space in which high-altitude cloud/haze formation is not expected to be significant for hydrogen- dominated atmospheres.
A seven-planet resonant chain in TRAPPIST-1
- Physics, Geology
- 2017
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…
Updated Masses for the TRAPPIST-1 Planets
- Geology, Physics
- 2017
The newly detected TRAPPIST-1 system, with seven low-mass, roughly Earth-sized planets transiting a nearby ultra-cool dwarf, is one of the most important exoplanet discoveries to date. The short…
The Threatening Environment of the TRAPPIST-1 Planets
- Physics, Geology
- 2017
Recently, four additional Earth-mass planets were discovered orbiting the nearby ultracool M8 dwarf TRAPPIST-1, making a remarkable total of seven planets with equilibrium temperatures compatible…
The Solar Neighborhood XXXII. The Hydrogen Burning Limit
- Physics
- 2013
We construct a Hertzsprung-Russell diagram for the stellar/substellar boundary based on a sample of 63 objects ranging in spectral type from M6V to L4. We report newly observed VRI photometry for all…
Characterization of the Very Low Mass Secondary in the GJ 660.1AB System
- Physics, Geology
- 2015
We present spectroscopic analysis of the low mass binary star system GJ 660.1AB, a pair of nearby M dwarfs for which we have obtained separated near-infrared spectra (0.9-2.5 $\mu$m) with the SpeX…
A Nongray Theory of Extrasolar Giant Planets and Brown Dwarfs
- Physics, Geology
- 1997
We present the results of a new series of nongray calculations of the atmospheres, spectra, colors, and evolution of extrasolar giant planets (EGPs) and brown dwarfs for effective temperatures below…
Strong XUV irradiation of the Earth-sized exoplanets orbiting the ultracool dwarf TRAPPIST-1
- Physics, Geology
- 2017
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 Earth-sized planets. We find the star is a…
UV surface habitability of the TRAPPIST-1 system
- Physics, Geology
- 2017
With the discovery of rocky planets in the temperate habitable zone (HZ) of the close-by cool star TRAPPIST-1 the question of whether such planets could harbour life arises. Habitable planets around…