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TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data

Kostov, Veselin B. and Powell, Brian P. and Orosz, Jerome A. and Welsh, William F. and Cochran, William and Collins, Karen A. and Endl, Michael and Hellier, Coel and Latham, David W. and MacQueen, Phillip and Pepper, Joshua and Quarles, Billy and Sairam, Lalitha and Torres, Guillermo and Wilson, Robert F. and Bergeron, Serge and Boyce, Pat and Bieryla, Allyson and Buchheim, Robert and Christiansen, Caleb Ben and Ciardi, David R. and Collins, Kevin I. and Conti, Dennis M. and Dixon, Scott and Guerra, Pere and Haghighipour, Nader and Herman, Jeffrey and Hintz, Eric G. and Howard, Ward S. and Jensen, Eric L. N. and Kielkopf, John F. and Kruse, Ethan and Law, Nicholas M. and Martin, David and Maxted, Pierre F. L. and Montet, Benjamin T. and Murgas, Felipe and Nelson, Matt and Olmschenk, Greg and Otero, Sebastian and Quimby, Robert and Richmond, Michael and Schwarz, Richard P. and Shporer, Avi and Stassun, Keivan G. and Stephens, Denise C. and Triaud, Amaury H. M. J. and Ulowetz, Joe and Walter, Bradley S. and Wiley, Edward and Wood, David and Yenawine, Mitchell and Agol, Eric and Barclay, Thomas and Beatty, Thomas G. and Boisse, Isabelle and Caldwell, Douglas A. and Christiansen, Jessie and Colón, Knicole D. and Deleuil, Magali and Doyle, Laurance and Fausnaugh, Michael and Fűrész, Gábor and Gilbert, Emily A. and Hébrard, Guillaume and James, David J. and Jenkins, Jon and Kane, Stephen R. and Kopparapu, Ravi and Li, Gongjie and Lissauer, Jack J. and Lund, Michael B. and Majewski, Steve R. and Mazeh, Tsevi and Quinn, Samuel N. and Quintana, Elisa and Ricker, George and Rodriguez, Joseph E. and Rowe, Jason and Santerne, Alexander and Schlieder, Joshua and Seager, Sara and Standing, Matthew R. and Stevens, Daniel J. and Ting, Eric B. and Vanderspek, Roland and Winn, Joshua N. (2021) TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data. Astronomical Journal, 162 (6). Art. No. 234. ISSN 0004-6256. doi:10.3847/1538-3881/ac223a.

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We report the first discovery of a transiting circumbinary planet detected from a single sector of Transiting Exoplanet Survey Satellite (TESS) data. During Sector 21, the planet TIC 172900988b transited the primary star and then five days later it transited the secondary star. The binary is itself eclipsing, with a period P ≈ 19.7 days and an eccentricity e ≈ 0.45. Archival data from ASAS-SN, Evryscope, KELT, and SuperWASP reveal a prominent apsidal motion of the binary orbit, caused by the dynamical interactions between the binary and the planet. A comprehensive photodynamical analysis of the TESS, archival and follow-up data yields stellar masses and radii of M₁ = 1.2384 ±0.0007 M_⊙ and R₁ = 1.3827 ± 0.0016 R_⊙ for the primary and M₂ = 1.2019 ± 0.0007 M_⊙ and R₂ = 1.3124 ± 0.0012 R_⊙ for the secondary. The radius of the planet is R₃ = 11.25 ± 0.44 R_⊕ (1.004 ± 0.039 R_(Jup)). The planet's mass and orbital properties are not uniquely determined—there are six solutions with nearly equal likelihood. Specifically, we find that the planet's mass is in the range of 824 ≲ M₃ ≲ 981 M⊕ (2.65 ≲ M₃ ≲ 3.09 M_(Jup)), its orbital period could be 188.8, 190.4, 194.0, 199.0, 200.4, or 204.1 days, and the eccentricity is between 0.02 and 0.09. At V = 10.141 mag, the system is accessible for high-resolution spectroscopic observations, e.g., the Rossiter–McLaughlin effect and transit spectroscopy.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kostov, Veselin B.0000-0001-9786-1031
Powell, Brian P.0000-0003-0501-2636
Orosz, Jerome A.0000-0001-9647-2886
Welsh, William F.0000-0003-2381-5301
Cochran, William0000-0001-9662-3496
Collins, Karen A.0000-0001-6588-9574
Endl, Michael0000-0002-7714-6310
Hellier, Coel0000-0002-3439-1439
Latham, David W.0000-0001-9911-7388
Pepper, Joshua0000-0002-3827-8417
Quarles, Billy0000-0002-9644-8330
Sairam, Lalitha0000-0001-8102-3033
Torres, Guillermo0000-0002-5286-0251
Wilson, Robert F.0000-0002-4235-6369
Bergeron, Serge0000-0003-0846-1744
Bieryla, Allyson0000-0001-6637-5401
Ciardi, David R.0000-0002-5741-3047
Collins, Kevin I.0000-0003-2781-3207
Conti, Dennis M.0000-0003-2239-0567
Guerra, Pere0000-0002-4308-2339
Haghighipour, Nader0000-0002-5234-6375
Hintz, Eric G.0000-0002-9867-7938
Howard, Ward S.0000-0002-0583-0949
Jensen, Eric L. N.0000-0002-4625-7333
Kielkopf, John F.0000-0003-0497-2651
Kruse, Ethan0000-0002-0493-1342
Law, Nicholas M.0000-0001-9380-6457
Martin, David0000-0002-7595-6360
Maxted, Pierre F. L.0000-0003-3794-1317
Montet, Benjamin T.0000-0001-7516-8308
Murgas, Felipe0000-0001-9087-1245
Olmschenk, Greg0000-0001-8472-2219
Quimby, Robert0000-0001-9171-5236
Richmond, Michael0000-0002-7676-8302
Schwarz, Richard P.0000-0001-8227-1020
Shporer, Avi0000-0002-1836-3120
Stassun, Keivan G.0000-0002-3481-9052
Stephens, Denise C.0000-0003-4658-7567
Triaud, Amaury H. M. J.0000-0002-5510-8751
Yenawine, Mitchell0000-0001-6556-1536
Agol, Eric0000-0002-0802-9145
Barclay, Thomas0000-0001-7139-2724
Beatty, Thomas G.0000-0002-9539-4203
Boisse, Isabelle0000-0001-8388-8399
Caldwell, Douglas A.0000-0003-1963-9616
Christiansen, Jessie0000-0002-8035-4778
Colón, Knicole D.0000-0001-8020-7121
Deleuil, Magali0000-0001-6036-0225
Fausnaugh, Michael0000-0002-9113-7162
Gilbert, Emily A.0000-0002-0388-8004
Hébrard, Guillaume0000-0001-5450-7067
James, David J.0000-0001-5160-4486
Jenkins, Jon0000-0002-4715-9460
Kane, Stephen R.0000-0002-7084-0529
Kopparapu, Ravi0000-0002-5893-2471
Li, Gongjie0000-0001-8308-0808
Lissauer, Jack J.0000-0001-6513-1659
Lund, Michael B.0000-0003-2527-1598
Majewski, Steve R.0000-0003-2025-3147
Mazeh, Tsevi0000-0002-3569-3391
Quinn, Samuel N.0000-0002-8964-8377
Quintana, Elisa0000-0003-1309-2904
Ricker, George0000-0003-2058-6662
Rodriguez, Joseph E.0000-0001-8812-0565
Rowe, Jason0000-0002-5904-1865
Santerne, Alexander0000-0002-3586-1316
Schlieder, Joshua0000-0001-5347-7062
Seager, Sara0000-0002-6892-6948
Standing, Matthew R.0000-0002-7608-8905
Stevens, Daniel J.0000-0002-5951-8328
Ting, Eric B.0000-0002-8219-9505
Vanderspek, Roland0000-0001-6763-6562
Winn, Joshua N.0000-0002-4265-047X
Additional Information:© 2021. The American Astronomical Society. Received 2021 May 13; revised 2021 August 18; accepted 2021 August 26; published 2021 November 10. This paper includes data collected by the TESS mission, which are publicly available from the Mikulski Archive for Space Telescopes (MAST). Funding for the TESS mission is provided by NASA's Science Mission directorate. V.B.K. is thankful for support from NASA grants 80NSSC20K0054 and 80NSSC20K0850. This material is based upon work supported by the National Science Foundation under Grant NSF AST-1617004 to W.F.W. and J.A.O.. We are also deeply grateful to John Hood, Jr. for his generous support of exoplanet research at San Diego State University. D.J.S. is supported as an Eberly Research Fellow by the Eberly College of Science at The Pennsylvania State University. The Center for Exoplanets and Habitable Worlds is supported by The Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. N.H. acknowledges support from NASA XRP through grant No. 80NSSC18K051. Support for this work was provided by NASA through the NASA Hubble Fellowship grant HF2-51464 awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Center for Climate Simulation (NCCS) at Goddard Space Flight Center, and through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. Personnel directly supporting this effort were Mark L. Carroll, Laura E. Carriere, Ellen M. Salmon, Nicko D. Acks, Matthew J. Stroud, Bruce E. Pfaff, Lyn E. Gerner, Timothy M. Burch, and Savannah L. Strong. This research has made use of the Exoplanet Follow-up Observation Program website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. This research was supported in part through research cyberinfrastructure resources and services provided by the Partnership for an Advanced Computing Environment (PACE) at the Georgia Institute of Technology. This is University of Texas Center for Planetary Systems Habitability contribution #0035. This work has made use of data from the European Space Agency (ESA) mission Gaia (, processed by the Gaia Data Processing and Analysis Consortium (DPAC, Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This work makes use of observations from the LCOGT network. LCOGT telescope time was granted by NOIRLab through the Mid-Scale Innovations Program (MSIP). MSIP is funded by NSF. Based in part on observations obtained with the Apache Point Observatory 3.5 m telescope, which is owned and operated by the Astrophysical Research Consortium. Based in part on observations made at Observatoire de Haute Provence (CNRS), France. The SOPHIE observations were obtained under an OHP DDT program (PI Triaud) and this work received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 803193/BEBOP) as well as from the Leverhulme Trust (research project grant No. RPG-2018-418). This work makes use of observations from CHEOPS, which is an ESA mission in partnership with Switzerland with important contributions to the payload and the ground segment from Austria, Belgium, France, Germany, Hungary, Italy, Portugal, Spain, Sweden, and the United Kingdom. We thank Kate Isaak, the ESA CHEOPS Project Science Scientist, and the CHEOPS Science Operations Centre for their help and support with the CHEOPS observations. The ongoing AAVSO Photometric All-Sky Survey (APASS) is funded by the Robert Martin Ayers Sciences Fund. Facilities: Gaia - , CHEOPS - , MAST - , TESS - , ASAS-SN - , Evryscope - , KELT - , WASP - , NCCS - , LCOGT. - Software: AstroImageJ (Collins et al. 2017), ELC (Orosz et al. 2019,), eleanor (Feinstein et al. 2019), EXOFASTv2 (Eastman et al. 2019), TAPIR (Jensen et al. 2013), mercury6 (Chambers et al.2002), Rebound (Rein & Liu 2012; Rein & Spiegel 2015)
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Eberly College of ScienceUNSPECIFIED
Pennsylvania State UniversityUNSPECIFIED
Pennsylvania Space Grant ConsortiumUNSPECIFIED
Gaia Multilateral AgreementUNSPECIFIED
European Research Council (ERC)803193
Leverhulme TrustRPG-2018-418
Subject Keywords:Exoplanet detection methods; Exoplanets; Exoplanet astronomy; Eclipsing binary stars
Issue or Number:6
Classification Code:Unified Astronomy Thesaurus concepts: Exoplanet detection methods (489); Exoplanets (498); Exoplanet astronomy (486); Eclipsing binary stars (444)
Record Number:CaltechAUTHORS:20211122-203143614
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Official Citation:Veselin B. Kostov et al 2021 AJ 162 234
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:111983
Deposited By: Tony Diaz
Deposited On:22 Nov 2021 22:57
Last Modified:22 Nov 2021 22:57

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