A seven-planet resonant chain in TRAPPIST-1

@article{Luger2017ASR,
  title={A seven-planet resonant chain in TRAPPIST-1},
  author={Rodrigo Luger and Marko Sestovic and Ethan Kruse and Simon L. Grimm and B-O. Demory and Eric Agol and {\'E}meline Bolmont and Daniel C. Fabrycky and Catarina Silva Fernandes and Val{\'e}rie Van Grootel and Adam J. Burgasser and Micha{\"e}l Gillon and James G. Ingalls and Emmanuel Jehin and Sean N. Raymond and Franck Selsis and Amaury H. M. J. Triaud and Thomas Barclay and Geert Barentsen and Steve B. Howell and Laetitia Delrez and Julien de Wit and Daniel Foreman-Mackey and Daniel L. Holdsworth and J{\'e}r{\'e}my Leconte and Susan M. Lederer and Martin Turbet and Yaseen Almleaky and Zouhair Benkhaldoun and Pierre Magain and Brett M. Morris and Kevin Heng and Didier Queloz},
  journal={Nature Astronomy},
  year={2017},
  volume={1},
  pages={0129}
}
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… 
How Flat Can a Planetary System Get? I. The Case of TRAPPIST-1
The seven planets orbiting TRAPPIST-1 in a compact near-resonant chain offer a unique case to study in planet formation theory. We demonstrate in this paper that the remarkable flatness of the
Formation of TRAPPIST-1 and other compact systems
TRAPPIST-1 is a nearby 0.08  M ⊙ M-star that was recently found to harbor a planetary system of at least seven Earth-sized planets, all within 0.1 au. The configuration confounds theorists as the
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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;
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Determining the architecture of multi-planetary systems is one of the cornerstones of understanding planet formation and evolution. Resonant systems are especially important as the fragility of their
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On the Age of the TRAPPIST-1 System
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
Stellar Parameters for Trappist-1
TRAPPIST-1 is an ultracool dwarf star transited by seven Earth-sized planets, for which thorough characterization of atmospheric properties, surface conditions encompassing habitability, and internal
Interior Structures and Tidal Heating in the TRAPPIST-1 Planets
With seven planets, the TRAPPIST-1 system has the largest number of exoplanets discovered in a single system so far. The system is of astrobiological interest, because three of its planets orbit in
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