• Medientyp: E-Artikel
  • Titel: HD 183579b: a warm sub-Neptune transiting a solar twin detected by TESS
  • Beteiligte: Gan, Tianjun; Bedell, Megan; Wang, Sharon Xuesong; Foreman-Mackey, Daniel; Meléndez, Jorge; Mao, Shude; Stassun, Keivan G; Howell, Steve B; Ziegler, Carl; Wittenmyer, Robert A; Hellier, Coel; Collins, Karen A; Shporer, Avi; Ricker, George R; Vanderspek, Roland; Latham, David W; Seager, Sara; Winn, Joshua N; Jenkins, Jon M; Addison, Brett C; Ballard, Sarah; Barclay, Thomas; Bean, Jacob L; Bowler, Brendan P; [...]
  • Erschienen: Oxford University Press (OUP), 2021
  • Erschienen in: Monthly Notices of the Royal Astronomical Society
  • Sprache: Englisch
  • DOI: 10.1093/mnras/stab2224
  • ISSN: 0035-8711; 1365-2966
  • Schlagwörter: Space and Planetary Science ; Astronomy and Astrophysics
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  • Beschreibung: <jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery and characterization of a transiting warm sub-Neptune planet around the nearby bright (V = 8.75 mag, K = 7.15 mag) solar twin HD 183579, delivered by the Transiting Exoplanet Survey Satellite (TESS). The host star is located 56.8 ± 0.1 pc away with a radius of R* = 0.97 ± 0.02 R⊙ and a mass of M* = 1.03 ± 0.05 M⊙. We confirm the planetary nature by combining space and ground-based photometry, spectroscopy, and imaging. We find that HD 183579b (TOI-1055b) has a radius of Rp = 3.53 ± 0.13 R⊕ on a 17.47 d orbit with a mass of Mp = 11.2 ± 5.4 M⊕ (3σ mass upper limit of 27.4 M⊕). HD 183579b is the fifth brightest known sub-Neptune planet system in the sky, making it an excellent target for future studies of the interior structure and atmospheric properties. By performing a line-by-line differential analysis using the high-resolution and signal-to-noise ratio HARPS spectra, we find that HD 183579 joins the typical solar twin sample, without a statistically significant refractory element depletion.</jats:p>
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