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

C. R. Mann, P. A. Dalba, D. Lafrenière, B. J. Fulton, G. Hébrard, I. Boisse, S. Dalal, M. Deleuil, X. Delfosse, O. Demangeon, T. Forveille, N. Heidari, F. Kiefer, E. Martioli, C. Moutou, M. Endl, W. D. Cochran, P. J. MacQueen, F. Marchis, D. Dragomir, A. F. Gupta, D. L. Feliz, B. Nicholson, C. Ziegler, S. Villanueva, J. F. Rowe, G. Jan Talens, D. Thorngren, D. LaCourse, T. Jacobs, A. W. Howard, A. Bieryla, D. W. Latham, M. Rabus, T. Fetherolf, C. Hellier, S. B. Howell, P. P. Plavchan, M. Reefe, D. Combs, M. Bowen, J. Wittrock, G. R. Ricker, S. Seager, J. N. Winn, J. M. Jenkins, T. Barclay, D. Watanabe, K. A. Collins, J. D. Eastman, E. B. Ting

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 (MP = 1.29 MJup, RP = 1.05 RJup) 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.

Exoplanet astronomy; Exoplanet systems; Exoplanet dynamics; Exoplanet detection methods; Astrophysics - Earth and Planetary Astrophysics

The Astronomical Journal
Volume 166, Number 6, Page 27
2023 December

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia