Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. III. Recovery and Confirmation of a Temperate, Mildly Eccentric, Single-transit Jupiter Orbiting TOI-2010
Barclay, Thomas; Hellier, Coel; Bieryla, Allyson; Latham, David W.; Cochran, William D.; Endl, Michael; Feliz, Dax L.; Howell, Steve B.; Fulton, Benjamin J.; Howard, Andrew W.; Dalba, Paul A.; Fetherolf, Tara; Ziegler, Carl; Collins, Karen A.; Watanabe, David; Ricker, George R.; Winn, Joshua N.; Jenkins, Jon M.; Seager, S.; Marchis, Franck; Dragomir, Diana; Eastman, Jason D.; Ting, Eric B.; Plavchan, Peter; Lafrenière, David; Martioli, Eder; Forveille, Thierry; Delfosse, Xavier; Reefe, Michael; Deleuil, Magali; Thorngren, Daniel; Moutou, Claire; Hébrard, Guillaume; Gupta, Arvind F.; Wittrock, Justin; Rabus, Markus; Mann, Christopher R.; Talens, Geert Jan; Rowe, Jason; Villanueva, Steven; LaCourse, Daryll; Kiefer, Flavien; MacQueen, Phillip; Boisse, Isabelle; Heidari, Neda; Dalal, Shweta; Bowen, Michael; Jacobs, Tom; Demangeon, Olivier; Nicholson, Belinda A.; Combs, Deven
Canada, United States, France, United Kingdom, Portugal, Brazil, Australia, Chile
Abstract
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.