TOI-1749: an M dwarf with a Trio of Planets including a Near-resonant Pair
Artikel i vetenskaplig tidskrift, 2021
We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05 days, and radii of 1.4, 2.1, and 2.5 R (circle plus), respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15 M (circle plus) for TOI-1749b, c, and d, respectively, from transit timing variations. The periods, sizes, and tentative masses of these planets are in line with a scenario in which all three planets initially had a hydrogen envelope on top of a rocky core, and only the envelope of the innermost planet has been stripped away by photoevaporation and/or core-powered mass-loss mechanisms. These planets are similar to other planetary trios found around M dwarfs, such as TOI-175b,c,d and TOI-270b,c,d, in the sense that the outer pair has a period ratio within 1% of 2. Such a characteristic orbital configuration, in which an additional planet is located interior to a near 2:1 period-ratio pair, is relatively rare around FGK dwarfs.
Författare
A. Fukui
Instituto de Astrofísica de Canarias
University of Tokyo
Judith Korth
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
J. H. Livingston
University of Tokyo
J. D. Twicken
NASA Ames Research Center
SETI Institute
M. R. Zapatero Osorio
Centro de Astrobiología (INTA-CSIC)
J. M. Jenkins
NASA Ames Research Center
M. Mori
University of Tokyo
F. Murgas
Universidad de la Laguna
Instituto de Astrofísica de Canarias
M. Ogihara
Tokyo Institute of Technology
National Astronomical Observatory of Japan
N. Narita
Instituto de Astrofísica de Canarias
Japan Science and Technology Agency
Astrobiology Center, Japan
University of Tokyo
E. Palle
Universidad de la Laguna
Instituto de Astrofísica de Canarias
K. G. Stassun
Vanderbilt University
Fisk University
G. Nowak
Instituto de Astrofísica de Canarias
Universidad de la Laguna
D. R. Ciardi
California Institute of Technology (Caltech)
L. Alvarez-Hernandez
Universidad de la Laguna
V. J. S. Bejar
Universidad de la Laguna
Instituto de Astrofísica de Canarias
N. Casasayas-Barris
Universiteit Leiden
N. Crouzet
European Space Research and Technology Centre (ESA ESTEC)
J. P. de Leon
University of Tokyo
E. Esparza-Borges
Universidad de la Laguna
D. Hidalgo Soto
Instituto de Astrofísica de Canarias
Universidad de la Laguna
K. Isogai
University of Tokyo
Kyoto University
K. Kawauchi
University of Tokyo
Instituto de Astrofísica de Canarias
P. Klagyivik
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
T. Kodama
University of Tokyo
S. Kurita
University of Tokyo
N. Kusakabe
National Astronomical Observatory of Japan
Astrobiology Center, Japan
R. Luque
Instituto de Astrofisica de Andalucía (IAA)
Universidad de la Laguna
Instituto de Astrofísica de Canarias
A. Madrigal-Aguado
Instituto de Astrofísica de Canarias
Universidad de la Laguna
P. Montanes Rodriguez
Instituto de Astrofísica de Canarias
Universidad de la Laguna
G. Morello
Instituto de Astrofísica de Canarias
Universidad de la Laguna
T. Nishiumi
The Graduate University for Advanced Studies (SOKENDAI)
Astrobiology Center, Japan
J. Orell-Miquel
Universidad de la Laguna
Instituto de Astrofísica de Canarias
M. Oshagh
Universidad de la Laguna
Instituto de Astrofísica de Canarias
H. Parviainen
Instituto de Astrofísica de Canarias
Universidad de la Laguna
M. Sanchez-Benavente
Instituto de Astrofísica de Canarias
Universidad de la Laguna
M. Stangret
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Y. Terada
Academia Sinica
National Taiwan University
N. Watanabe
University of Tokyo
G. Chen
Chinese Academy of Sciences
M. Tamura
National Astronomical Observatory of Japan
Astrobiology Center, Japan
University of Tokyo
P. Bosch-Cabot
Observatori Astronòmic Albanya
M. Bowen
George Mason University
K. Eastridge
George Mason University
L. Freour
Danmarks Tekniske Universitet (DTU)
E. Gonzales
University of California at Santa Cruz
P. Guerra
Observatori Astronòmic Albanya
Y. Jundiyeh
Danmarks Tekniske Universitet (DTU)
T. K. Kim
Thomas Jefferson High Sch Sci & Technol, 6560 Braddock Rd
George Mason University
Kroer
Danmarks Tekniske Universitet (DTU)
A. M. Levine
Massachusetts Institute of Technology (MIT)
E. H. Morgan
Massachusetts Institute of Technology (MIT)
M. Reefe
George Mason University
R. Tronsgaard
Danmarks Tekniske Universitet (DTU)
C. K. Wedderkopp
Danmarks Tekniske Universitet (DTU)
J. Wittrock
George Mason University
K. A. Collins
Harvard-Smithsonian Center for Astrophysics
K. Hesse
Wesleyan University
D. W. Latham
Harvard-Smithsonian Center for Astrophysics
G. R. Ricker
Massachusetts Institute of Technology (MIT)
S. Seager
Massachusetts Institute of Technology (MIT)
R. Vanderspek
Massachusetts Institute of Technology (MIT)
J. Winn
Princeton University
E. Bachelet
Las Cumbres Observatory Global Telescope Network
M. Bowman
Las Cumbres Observatory Global Telescope Network
C. McCully
Las Cumbres Observatory Global Telescope Network
M. Daily
Las Cumbres Observatory Global Telescope Network
D. Harbeck
Las Cumbres Observatory Global Telescope Network
N. H. Volgenau
Las Cumbres Observatory Global Telescope Network
Astronomical Journal
0004-6256 (ISSN) 1538-3881 (eISSN)
Vol. 162 4 167Ämneskategorier
Subatomär fysik
Astronomi, astrofysik och kosmologi
Annan fysik
DOI
10.3847/1538-3881/ac13a5