An Eccentric Massive Jupiter Orbiting a Subgiant on a 9.5-day Period Discovered in the Transiting Exoplanet Survey Satellite Full Frame Images
Henning, Thomas; Torres, Guillermo; Barclay, Thomas; Vanderburg, Andrew; Batalha, Natalie M.; Bieryla, Allyson; Latham, David W.; Quinn, Samuel N.; Berlind, Perry; Calkins, Michael L.; Esquerdo, Gilbert A.; Law, Nicholas M.; Jordán, Andrés; Espinoza, Néstor; Brahm, Rafael; Pepper, Joshua; Stassun, Keivan G.; Zhou, George; Schlieder, Joshua E.; Crossfield, Ian J. M.; Ziegler, Carl; Collins, Karen A.; Wohler, Bill; Ricker, George R.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Tokovinin, Andrei; Günther, Maximilian N.; Shporer, Avi; Ciardi, David R.; Dragomir, Diana; Mann, Andrew W.; Rodriguez, Joseph E.; Oelkers, Ryan J.; Gaudi, B. Scott; Penev, Kaloyan; Colón, Knicole D.; Eastman, Jason D.; Kielkopf, John F.; Villanueva, Steven, Jr.; Huang, Chelsea X.; Levine, Alan M.; Boyd, Patricia T.; Daylan, Tansu; Bouma, L. G.; Burt, Jennifer; Matthews, Elisabeth; Vanderspek, Roland K.; Guerrero, Natalia; Relles, Howard M.; Sarkis, Paula; Garcia Soto, Aylin; Paegert, Martin; Krishnamurthy, Akshata; Dynes, Scott; Quintana, Elisa V.; Rowden, Pamela; Yu, Liang; Yahalomi, Daniel A.; Zhan, Zhuchang; Glidden, Ana; Conti, Dennis M.; Essack, Zahra; Dittmann, Jason; Lewin, Pablo; Wong, Ian; Morgan, Edward H.; Christiansen, Jessie; Morris, Robert L.; Sha, Lizhou; Villaseñor, Jesus Noel; Ikwut-Ukwa, Mma; Tsirulik, Shelly
United States, Chile, Canada, Germany, United Kingdom
Abstract
We report the discovery of TOI-172 b from the Transiting Exoplanet Survey Satellite (TESS) mission, a massive hot Jupiter transiting a slightly evolved G star with a 9.48-day orbital period. This is the first planet to be confirmed from analysis of only the TESS full frame images, because the host star was not chosen as a two-minute cadence target. From a global analysis of the TESS photometry and follow-up observations carried out by the TESS Follow-up Observing Program Working Group, TOI-172 (TIC 29857954) is a slightly evolved star with an effective temperature of T eff = 5645 ± 50 K, a mass of M ⋆ = {1.128}-0.061+0.065 M ⊙, radius of R ⋆ = {1.777}-0.044+0.047 R ⊙, a surface gravity of log g ⋆ = {3.993}-0.028+0.027, and an age of {7.4}-1.5+1.6 {Gyr}. Its planetary companion (TOI-172 b) has a radius of R P = {0.965}-0.029+0.032 R J, a mass of M P = {5.42}-0.20+0.22 M J, and is on an eccentric orbit (e={0.3806}-0.0090+0.0093). TOI-172 b is one of the few known massive giant planets on a highly eccentric short-period orbit. Future study of the atmosphere of this planet and its system architecture offer opportunities to understand the formation and evolution of similar systems.