Precise Transit and Radial-velocity Characterization of a Resonant Pair: The Warm Jupiter TOI-216c and Eccentric Warm Neptune TOI-216b
Article
Article Title | Precise Transit and Radial-velocity Characterization of a Resonant Pair: The Warm Jupiter TOI-216c and Eccentric Warm Neptune TOI-216b |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Dawson, Rebekah I. (Author), Huang, Chelsea X. (Author), Brahm, Rafael (Author), Collins, Karen A. (Author), Hobson, Melissa J. (Author), Jordan, Andres (Author), Dong, Jiayin (Author), Korth, Judith (Author), Trifonov, Trifon (Author), Abe, Lyu (Author), Agabi, Abdelkrim (Author), Bruni, Ivan (Author), Butler, R. Paul (Author), Barbieri, Mauro (Author), Collins, Kevin I. (Author), Conti, Dennis M. (Author), Crane, Jeffrey D. (Author), Crouzet, Nicolas (Author), Dransfield, Georgina (Author), Evans, Phil (Author), Espinoza, Nestor (Author), Gan, Tianjun (Author), Guillot, Tristan (Author), Henning, Thomas (Author), Lissauer, Jack J. (Author), Jensen, Eric L. N. (Author), Marie Sainte, Wenceslas (Author), Mekarnia, Djamel (Author), Myers, Gordon (Author), Nandakumar, Sangeetha (Author), Relles, Howard M. (Author), Sarkis, Paula (Author), Torres, Pascal (Author), Shectman, Stephen (Author), Schmider, Francois-Xavier (Author), Shporer, Avi (Author), Stockdale, Chris (Author), Teske, Johanna (Author), Triaud, Amaury H. M. J. (Author), Wang, Sharon Xuesong (Author), Ziegler, Carl (Author), Ricker, G. (Author), Vanderspek, R. (Author), Latham, David W. (Author), Seager, S. (Author), Winn, J. (Author), Jenkins, Jon M. (Author), Bouma, L. G. (Author), Burt, Jennifer A. (Author), Charbonneau, David (Author), Levine, Alan M. (Author), McDermott, Scott (Author), McLean, Brian (Author), Rose, Mark E. (Author), Vanderburg, Andrew (Author) and Wohler, Bill (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 161 (4), pp. 1-16 |
Article Number | 161 |
Number of Pages | 16 |
Year | 2021 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/abd8d0 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/abd8d0 |
Abstract | TOI-216 hosts a pair of warm, large exoplanets discovered by the TESS mission. These planets were found to be in or near the 2:1 resonance, and both of them exhibit transit timing variations (TTVs). Precise characterization of the planets’ masses and radii, orbital properties, and resonant behavior can test theories for the origins of planets orbiting close to their stars. Previous characterization of the system using the first six sectors of TESS data suffered from a degeneracy between planet mass and orbital eccentricity. Radial-velocity measurements using HARPS, FEROS, and the Planet Finder Spectrograph break that degeneracy, and an expanded TTV baseline from TESS and an ongoing ground-based transit observing campaign increase the precision of the mass and eccentricity measurements. We determine that TOI-216c is a warm Jupiter, TOI-216b is an eccentric warm Neptune, and that they librate in 2:1 resonance with a moderate libration amplitude of 60-+22 deg, a small but significant free eccentricity of 0.0222-+0.00030.0005 for TOI-216b, and a small but significant mutual inclination of 1°.2–3°.9 (95% confidence interval). The libration amplitude, free eccentricity, and mutual inclination imply a disturbance of TOI-216b before or after resonance capture, perhaps by an undetected third planet. |
Keywords | Exoplanet astronomy (486); Exoplanet dynamics (490); Transit timing variation method (1710); Radial velocity (1332); Astrophysics - Earth and Planetary Astrophysics |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Pennsylvania State University, United States |
Massachusetts Institute of Technology, United States | |
Adolfo Ibanez University, Chile | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Millennium Institute of Astrophysics, Chile | |
University of Cologne, Germany | |
Max Planck Society, Germany | |
Cote d'Azur University, France | |
National Institute for Astrophysics, Italy | |
Carnegie Institution of Washington, United States | |
University of Atacama, Chile | |
George Mason University, United States | |
American Association of Variable Star Observers, United States | |
European Space Agency, France | |
University of Birmingham, United Kingdom | |
El Sauce Observatory, Chile | |
Space Telescope Science Institute, United States | |
Tsinghua University, China | |
NASA Ames Research Center, United States | |
Swarthmore College, United States | |
Concordia Station, Antarctica | |
Hazelwood Observatory, Australia | |
University of Toronto, Canada | |
Princeton University, United States | |
California Institute of Technology (Caltech), United States | |
Proto-Logic Consulting, United States | |
University of Texas at Austin, United States |
https://research.usq.edu.au/item/q7264/precise-transit-and-radial-velocity-characterization-of-a-resonant-pair-the-warm-jupiter-toi-216c-and-eccentric-warm-neptune-toi-216b
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