Dawson, Rebekah I., Huang, Chelsea X., Brahm, Rafael, Collins, Karen A., Hobson, Melissa J. ORCID: 0000-0002-5945-7975, Jordan, Andres, Dong, Jiayin ORCID: 0000-0002-3610-6953, Korth, Judith ORCID: 0000-0002-0076-6239, Trifonov, Trifon, Abe, Lyu, Agabi, Abdelkrim, Bruni, Ivan, Butler, R. Paul, Barbieri, Mauro, Collins, Kevin I., Conti, Dennis M., Crane, Jeffrey D., Crouzet, Nicolas, Dransfield, Georgina, Evans, Phil, Espinoza, Nestor, Gan, Tianjun, Guillot, Tristan, Henning, Thomas, Lissauer, Jack J., Jensen, Eric L. N., Sainte, Wenceslas Marie, Mekarnia, Djamel, Myers, Gordon, Nandakumar, Sangeetha, Relles, Howard M., Sarkis, Paula, Torres, Pascal, Shectman, Stephen, Schmider, Francois-Xavier ORCID: 0000-0003-3914-3546, Shporer, Avi ORCID: 0000-0002-1836-3120, Stockdale, Chris, Teske, Johanna, Triaud, Amaury H. M. J., Wang, Sharon Xuesong, Ziegler, Carl, Ricker, G., Vanderspek, R., Latham, David W., Seager, S., Winn, J., Jenkins, Jon M., Bouma, L. G., Burt, Jennifer A., Charbonneau, David, Levine, Alan M., McDermott, Scott, McLean, Brian, Rose, Mark E., Vanderburg, Andrew and Wohler, Bill (2021). Precise Transit and Radial-velocity Characterization of a Resonant Pair: The Warm Jupiter TOI-216c and Eccentric Warm Neptune TOI-216b. Astron. J., 161 (4). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-3881

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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 deg, a small but significant free eccentricity of for TOI-216b, and a small but significant mutual inclination of 12-39 (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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Dawson, Rebekah I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huang, Chelsea X.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brahm, RafaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Collins, Karen A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hobson, Melissa J.UNSPECIFIEDorcid.org/0000-0002-5945-7975UNSPECIFIED
Jordan, AndresUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dong, JiayinUNSPECIFIEDorcid.org/0000-0002-3610-6953UNSPECIFIED
Korth, JudithUNSPECIFIEDorcid.org/0000-0002-0076-6239UNSPECIFIED
Trifonov, TrifonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Abe, LyuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Agabi, AbdelkrimUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bruni, IvanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Butler, R. PaulUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barbieri, MauroUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Collins, Kevin I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Conti, Dennis M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crane, Jeffrey D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crouzet, NicolasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dransfield, GeorginaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Evans, PhilUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Espinoza, NestorUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gan, TianjunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guillot, TristanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Henning, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lissauer, Jack J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jensen, Eric L. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sainte, Wenceslas MarieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mekarnia, DjamelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Myers, GordonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nandakumar, SangeethaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Relles, Howard M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sarkis, PaulaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Torres, PascalUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shectman, StephenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmider, Francois-XavierUNSPECIFIEDorcid.org/0000-0003-3914-3546UNSPECIFIED
Shporer, AviUNSPECIFIEDorcid.org/0000-0002-1836-3120UNSPECIFIED
Stockdale, ChrisUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Teske, JohannaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Triaud, Amaury H. M. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wang, Sharon XuesongUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ziegler, CarlUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ricker, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vanderspek, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Latham, David W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Seager, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Winn, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jenkins, Jon M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bouma, L. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Burt, Jennifer A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Charbonneau, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Levine, Alan M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McDermott, ScottUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McLean, BrianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rose, Mark E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vanderburg, AndrewUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wohler, BillUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-607261
DOI: 10.3847/1538-3881/abd8d0
Journal or Publication Title: Astron. J.
Volume: 161
Number: 4
Date: 2021
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-3881
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60726

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