HD 202772A b: A Transiting Hot Jupiter around a Bright, Mildly Evolved Star in a Visual Binary Discovered by TESS
Trifonov, Trifon; Reffert, Sabine; Kürster, Martin; Bieryla, Allyson; Latham, David W.; Quinn, Samuel N.; Esquerdo, Gilbert A.; Kossakowski, Diana; Brahm, Rafael; Redfield, Seth; Stassun, Keivan G.; Siverd, Robert J.; Fulton, Benjamin J.; Howard, Andrew W.; Petigura, Erik A.; Kreidberg, Laura; Collins, Karen A.; Ricker, George R.; Vanderspek, Roland; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Beichman, Charles A.; Mazeh, Tsevi; Günther, Maximilian N.; Shporer, Avi; Ciardi, David R.; Huang, Chelsea X.; Boyd, Patricia T.; Wang, Songhu; Ting, Eric B.; Laughlin, Gregory; Brewer, John M.; Christiansen, Jessie L.; Paegert, Martin; Brown, Timothy M.; Henry, Todd; Zhang, Hui; Paredes, Leonardo A.; James, Hodari-Sadiki; Vezie, Michael; Isaacson, Howard; Wang, Xian-Yu; Shahaf, Sahar; Millholland, Sarah; Henze, Christopher; Eastman, Jason; Morris, Robert; Davis, Allen B.; Jones, Matias; Tronsgaard, René; Cruz, Bryndis; Fűrész, Gábor; Rodler, Florian; Fischer, Debra; Addison, Brett; Seligman, Darryl; Liang, En-Si; Worku, Keduse; Zakhozhay, Olga; Levine, Alen M.
United States, Chile, Germany, China, Australia, Denmark, Israel, Ukraine
Abstract
We report the first confirmation of a hot Jupiter discovered by the Transiting Exoplanet Survey Satellite (TESS) mission: HD 202772A b. The transit signal was detected in the data from TESS Sector 1, and was confirmed to be of planetary origin through radial velocity (RV) measurements. HD 202772A b is orbiting a mildly evolved star with a period of 3.3 days. With an apparent magnitude of V = 8.3, the star is among the brightest and most massive known to host a hot Jupiter. Based on the 27 days of TESS photometry and RV data from the CHIRON, HARPS, and Tillinghast Reflector Echelle Spectrograph, the planet has a mass of {1.017}-0.068+0.070 {M}{{J}} and radius of {1.545}-0.060+0.052 {R}{{J}}, making it an inflated gas giant. HD 202772A b is a rare example of a transiting hot Jupiter around a quickly evolving star. It is also one of the most strongly irradiated hot Jupiters currently known.