TY - JOUR
T1 - A seven-planet resonant chain in TRAPPIST-1
AU - Luger, Rodrigo
AU - Sestovic, Marko
AU - Kruse, Ethan
AU - Grimm, Simon L.
AU - Demory, Brice Olivier
AU - Agol, Eric
AU - Bolmont, Emeline
AU - Fabrycky, Daniel
AU - Fernandes, Catarina S.
AU - Van Grootel, Valérie
AU - Burgasser, Adam
AU - Gillon, Michaël
AU - Ingalls, James G.
AU - Jehin, Emmanuël
AU - Raymond, Sean N.
AU - Selsis, Franck
AU - Triaud, Amaury H.M.J.
AU - Barclay, Thomas
AU - Barentsen, Geert
AU - Howell, Steve B.
AU - Delrez, Laetitia
AU - De Wit, Julien
AU - Foreman-Mackey, Daniel
AU - Holdsworth, Daniel L.
AU - Leconte, Jérémy
AU - Lederer, Susan
AU - Turbet, Martin
AU - Almleaky, Yaseen
AU - Benkhaldoun, Zouhair
AU - Magain, Pierre
AU - Morris, Brett M.
AU - Heng, Kevin
AU - Queloz, DIdier
AU - Triaud, Amaury
PY - 2017/5/22
Y1 - 2017/5/22
N2 - The TRAPPIST-1 system is the first transiting planet system found orbiting an ultracool dwarf star 1. At least seven planets similar in radius to Earth were previously found to transit this host star 2. Subsequently, TRAPPIST-1 was observed as part of the K2 mission and, with these new data, we report the measurement of an 18.77 day orbital period for the outermost transiting planet, TRAPPIST-1 h, which was previously unconstrained. This value matches our theoretical expectations based on Laplace relations 3 and places TRAPPIST-1 h as the seventh member of a complex chain, with three-body resonances linking every member. We find that TRAPPIST-1 h has a radius of 0.752 R ⊠• and an equilibrium temperature of 173 K. We have also measured the rotational period of the star to be 3.3 days and detected a number of flares consistent with a low-activity, middle-aged, late M dwarf.
AB - The TRAPPIST-1 system is the first transiting planet system found orbiting an ultracool dwarf star 1. At least seven planets similar in radius to Earth were previously found to transit this host star 2. Subsequently, TRAPPIST-1 was observed as part of the K2 mission and, with these new data, we report the measurement of an 18.77 day orbital period for the outermost transiting planet, TRAPPIST-1 h, which was previously unconstrained. This value matches our theoretical expectations based on Laplace relations 3 and places TRAPPIST-1 h as the seventh member of a complex chain, with three-body resonances linking every member. We find that TRAPPIST-1 h has a radius of 0.752 R ⊠• and an equilibrium temperature of 173 K. We have also measured the rotational period of the star to be 3.3 days and detected a number of flares consistent with a low-activity, middle-aged, late M dwarf.
UR - http://www.scopus.com/inward/record.url?scp=85020709994&partnerID=8YFLogxK
U2 - 10.1038/s41550-017-0129
DO - 10.1038/s41550-017-0129
M3 - Article
AN - SCOPUS:85020709994
SN - 2397-3366
VL - 1
JO - Nature Astronomy
JF - Nature Astronomy
M1 - 0129
ER -