TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full-frame Images

Medientyp: E-Artikel
Titel: TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full-frame Images
Beteiligte: Rodriguez, Joseph E.; Quinn, Samuel N.; Zhou, George; Vanderburg, Andrew; Nielsen, Louise D.; Wittenmyer, Robert A.; Brahm, Rafael; Reed, Phillip A.; Huang, Chelsea X.; Vach, Sydney; Ciardi, David R.; Oelkers, Ryan J.; Stassun, Keivan G.; Hellier, Coel; Gaudi, B. Scott; Eastman, Jason D.; Collins, Karen A.; Bieryla, Allyson; Christian, Sam; Latham, David W.; Carleo, Ilaria; Wright, Duncan J.; Matthews, Elisabeth; Gonzales, Erica J.; [...]
Erschienen: American Astronomical Society, 2021
Erschienen in: The Astronomical Journal
Sprache: Nicht zu entscheiden
DOI: 10.3847/1538-3881/abe38a
ISSN: 0004-6256; 1538-3881
Schlagwörter: Space and Planetary Science ; Astronomy and Astrophysics
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Beschreibung: <jats:title>Abstract</jats:title> <jats:p>We present the discovery and characterization of five hot and warm Jupiters—TOI-628 b (TIC 281408474; HD 288842), TOI-640 b (TIC 147977348), TOI-1333 b (TIC 395171208, BD+47 3521A), TOI-1478 b (TIC 409794137), and TOI-1601 b (TIC 139375960)—based on data from NASA’s Transiting Exoplanet Survey Satellite (TESS). The five planets were identified from the full-frame images and were confirmed through a series of photometric and spectroscopic follow-up observations by the TESS Follow-up Observing Program Working Group. The planets are all Jovian size (<jats:italic>R</jats:italic> <jats:sub>P</jats:sub> = 1.01–1.77 <jats:italic>R</jats:italic> <jats:sub>J</jats:sub>) and have masses that range from 0.85 to 6.33 <jats:italic>M</jats:italic> <jats:sub>J</jats:sub>. The host stars of these systems have F and G spectral types (5595 ≤ <jats:italic>T</jats:italic> <jats:sub>eff</jats:sub> ≤ 6460 K) and are all relatively bright (9.5 < <jats:italic>V</jats:italic> < 10.8, 8.2 < <jats:italic>K</jats:italic> < 9.3), making them well suited for future detailed characterization efforts. Three of the systems in our sample (TOI-640 b, TOI-1333 b, and TOI-1601 b) orbit subgiant host stars (<jats:inline-formula> <jats:tex-math> <?CDATA $\mathrm{log}$?> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ajabe38aieqn1.gif" xlink:type="simple" /> </jats:inline-formula> <jats:italic>g</jats:italic> < 4.1). TOI-640 b is one of only three known hot Jupiters to have a highly inflated radius (<jats:italic>R</jats:italic> <jats:sub>P</jats:sub> > 1.7 <jats:italic>R</jats:italic> <jats:sub>J</jats:sub>, possibly a result of its host star’s evolution) and resides on an orbit with a period longer than 5 days. TOI-628 b is the most massive, hot Jupiter discovered to date by TESS with a measured mass of <jats:inline-formula> <jats:tex-math> <?CDATA ${6.31}_{-0.30}^{+0.28}$?> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ajabe38aieqn2.gif" xlink:type="simple" /> </jats:inline-formula> <jats:italic>M</jats:italic> <jats:sub>J</jats:sub> and a statistically significant, nonzero orbital eccentricity of <jats:italic>e</jats:italic> = <jats:inline-formula> <jats:tex-math> <?CDATA ${0.074}_{-0.022}^{+0.021}$?> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ajabe38aieqn3.gif" xlink:type="simple" /> </jats:inline-formula>. This planet would not have had enough time to circularize through tidal forces from our analysis, suggesting that it might be remnant eccentricity from its migration. The longest-period planet in this sample, TOI-1478 b (<jats:italic>P</jats:italic> = 10.18 days), is a warm Jupiter in a circular orbit around a near-solar analog. NASA’s TESS mission is continuing to increase the sample of well-characterized hot and warm Jupiters, complementing its primary mission goals.</jats:p>
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