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Saunders, Nicholas; Grunblatt, Samuel K.; Huber, Daniel; Collins, Karen A.; Jensen, Eric L. N.; Vanderburg, Andrew; Brahm, Rafael; Jordán, Andrés; Espinoza, Néstor; Henning, Thomas; Hobson, Melissa J.; Quinn, Samuel N.; Zhou, George; Butler, R. Paul; Crause, Lisa; Kuhn, Rudi B.; Moses Mogotsi, K.; Hellier, Coel; Angus, Ruth; Hattori, Soichiro; Chontos, Ashley; Ricker, George R.; Jenkins, Jon M.; Tenenbaum, Peter; [...]

TESS Giants Transiting Giants. I.: A Noninflated Hot Jupiter Orbiting a Massive Subgiant

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  • Medientyp: E-Artikel
  • Titel: TESS Giants Transiting Giants. I.: A Noninflated Hot Jupiter Orbiting a Massive Subgiant
  • Beteiligte: Saunders, Nicholas; Grunblatt, Samuel K.; Huber, Daniel; Collins, Karen A.; Jensen, Eric L. N.; Vanderburg, Andrew; Brahm, Rafael; Jordán, Andrés; Espinoza, Néstor; Henning, Thomas; Hobson, Melissa J.; Quinn, Samuel N.; Zhou, George; Butler, R. Paul; Crause, Lisa; Kuhn, Rudi B.; Moses Mogotsi, K.; Hellier, Coel; Angus, Ruth; Hattori, Soichiro; Chontos, Ashley; Ricker, George R.; Jenkins, Jon M.; Tenenbaum, Peter; [...]
  • Erschienen: American Astronomical Society, 2022
  • Erschienen in: The Astronomical Journal
  • Sprache: Nicht zu entscheiden
  • DOI: 10.3847/1538-3881/ac38a1
  • ISSN: 0004-6256; 1538-3881
  • Schlagwörter: Space and Planetary Science ; Astronomy and Astrophysics
  • Entstehung:
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  • Beschreibung: <jats:title>Abstract</jats:title> <jats:p>While the population of confirmed exoplanets continues to grow, the sample of confirmed transiting planets around evolved stars is still limited. We present the discovery and confirmation of a hot Jupiter orbiting TOI-2184 (TIC 176956893), a massive evolved subgiant (<jats:italic>M</jats:italic> <jats:sub>⋆</jats:sub> = 1.53 ± 0.12 <jats:italic>M</jats:italic> <jats:sub>⊙</jats:sub>, <jats:italic>R</jats:italic> <jats:sub>⋆</jats:sub> = 2.90 ± 0.14 <jats:italic>R</jats:italic> <jats:sub>⊙</jats:sub>) in the Transiting Exoplanet Survey Satellite (TESS) Southern Continuous Viewing Zone. The planet was flagged as a false positive by the TESS Quick-Look Pipeline due to periodic systematics introducing a spurious depth difference between even and odd transits. Using a new pipeline to remove background scattered light in TESS Full Frame Image data, we combine space-based TESS photometry, ground-based photometry, and ground-based radial velocity measurements to report a planet radius of <jats:italic>R</jats:italic> <jats:sub> <jats:italic>p</jats:italic> </jats:sub> = 1.017 ± 0.051 <jats:italic>R</jats:italic> <jats:sub> <jats:italic>J</jats:italic> </jats:sub> and mass of <jats:italic>M</jats:italic> <jats:sub> <jats:italic>p</jats:italic> </jats:sub> = 0.65 ± 0.16 <jats:italic>M</jats:italic> <jats:sub> <jats:italic>J</jats:italic> </jats:sub>. For a planet so close to its star, the mass and radius of TOI-2184b are unusually well matched to those of Jupiter. We find that the radius of TOI-2184b is smaller than theoretically predicted based on its mass and incident flux, providing a valuable new constraint on the timescale of post-main-sequence planet inflation. The discovery of TOI-2184b demonstrates the feasibility of detecting planets around faint (TESS magnitude &gt; 12) post-main-sequence stars and suggests that many more similar systems are waiting to be detected in the TESS FFIs, whose confirmation may elucidate the final stages of planetary system evolution.</jats:p>
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