The Astronomical Journal (Jan 2023)

Giant Outer Transiting Exoplanet Mass (GOT ’EM) Survey. III. Recovery and Confirmation of a Temperate, Mildly Eccentric, Single-transit Jupiter Orbiting TOI-2010

  • Christopher R. Mann,
  • Paul A. Dalba,
  • David Lafrenière,
  • Benjamin J. Fulton,
  • Guillaume Hébrard,
  • Isabelle Boisse,
  • Shweta Dalal,
  • Magali Deleuil,
  • Xavier Delfosse,
  • Olivier Demangeon,
  • Thierry Forveille,
  • Neda Heidari,
  • Flavien Kiefer,
  • Eder Martioli,
  • Claire Moutou,
  • Michael Endl,
  • William D. Cochran,
  • Phillip MacQueen,
  • Franck Marchis,
  • Diana Dragomir,
  • Arvind F. Gupta,
  • Dax L. Feliz,
  • Belinda A. Nicholson,
  • Carl Ziegler,
  • Steven Villanueva Jr.,
  • Jason Rowe,
  • Geert Jan Talens,
  • Daniel Thorngren,
  • Daryll LaCourse,
  • Tom Jacobs,
  • Andrew W. Howard,
  • Allyson Bieryla,
  • David W. Latham,
  • Markus Rabus,
  • Tara Fetherolf,
  • Coel Hellier,
  • Steve B. Howell,
  • Peter Plavchan,
  • Michael Reefe,
  • Deven Combs,
  • Michael Bowen,
  • Justin Wittrock,
  • George R. Ricker,
  • S. Seager,
  • Joshua N. Winn,
  • Jon M. Jenkins,
  • Thomas Barclay,
  • David Watanabe,
  • Karen A. Collins,
  • Jason D. Eastman,
  • Eric B. Ting

DOI
https://doi.org/10.3847/1538-3881/ad00bc
Journal volume & issue
Vol. 166, no. 6
p. 239

Abstract

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Large-scale exoplanet surveys like the Transiting Exoplanet Survey Satellite (TESS) mission are powerful tools for discovering large numbers of exoplanet candidates. Single-transit events are commonplace within the resulting candidate list due to the unavoidable limitation of the observing baseline. These single-transit planets often remain unverified due to their unknown orbital periods and consequent difficulty in scheduling follow-up observations. In some cases, radial velocity (RV) follow up can constrain the period enough to enable a future targeted transit detection. We present the confirmation of one such planet: TOI-2010 b. Nearly three years of RV coverage determined the period to a level where a broad window search could be undertaken with the Near-Earth Object Surveillance Satellite, detecting an additional transit. An additional detection in a much later TESS sector solidified our final parameter estimation. We find TOI-2010 b to be a Jovian planet ( M _P = 1.29 M _Jup , R _P = 1.05 R _Jup ) on a mildly eccentric orbit ( e = 0.21) with a period of P = 141.83403 days. Assuming a simple model with no albedo and perfect heat redistribution, the equilibrium temperature ranges from about 360 to 450 K from apastron to periastron. Its wide orbit and bright host star ( V = 9.85) make TOI-2010 b a valuable test bed for future low-insolation atmospheric analysis.

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