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Open Access Publications from the University of California

HD 202772A b: A Transiting Hot Jupiter around a Bright, Mildly Evolved Star in a Visual Binary Discovered by TESS

  • Author(s): Wang, Songhu
  • Jones, Matias
  • Shporer, Avi
  • Fulton, Benjamin J
  • Paredes, Leonardo A
  • Trifonov, Trifon
  • Kossakowski, Diana
  • Eastman, Jason
  • Redfield, Seth
  • Günther, Maximilian N
  • Kreidberg, Laura
  • Huang, Chelsea X
  • Millholland, Sarah
  • Seligman, Darryl
  • Fischer, Debra
  • Brahm, Rafael
  • Wang, Xian-Yu
  • Cruz, Bryndis
  • Henry, Todd
  • James, Hodari-Sadiki
  • Addison, Brett
  • Liang, En-Si
  • Davis, Allen B
  • Tronsgaard, René
  • Worku, Keduse
  • Brewer, John M
  • Kürster, Martin
  • Zhang, Hui
  • Beichman, Charles A
  • Bieryla, Allyson
  • Brown, Timothy M
  • Christiansen, Jessie L
  • Ciardi, David R
  • Collins, Karen A
  • Esquerdo, Gilbert A
  • Howard, Andrew W
  • Isaacson, Howard
  • Latham, David W
  • Mazeh, Tsevi
  • Petigura, Erik A
  • Quinn, Samuel N
  • Shahaf, Sahar
  • Siverd, Robert J
  • Rodler, Florian
  • Reffert, Sabine
  • Zakhozhay, Olga
  • Ricker, George R
  • Vanderspek, Roland
  • Seager, Sara
  • Winn, Joshua N
  • Jenkins, Jon M
  • Boyd, Patricia T
  • Fűrész, Gábor
  • Henze, Christopher
  • Levine, Alen M
  • Morris, Robert
  • Paegert, Martin
  • Stassun, Keivan G
  • Ting, Eric B
  • Vezie, Michael
  • Laughlin, Gregory
  • et al.

© 2019. The American Astronomical Society. All rights reserved.. 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 and radius of , 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.

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