TESS Asteroseismic Analysis of the Known Exoplanet Host Star HD 222076

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DOI

  • Chen Jiang, School of Physics and Astronomy, Sun Yat-Sen University
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  • Timothy R. Bedding, University of Sydney
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  • Keivan G. Stassun, Vanderbilt University, Vanderbilt Initiative in Data-intensive Astrophysics (VIDA)
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  • Dimitri Veras, University of Warwick
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  • Enrico Corsaro, Osservatorio Astrofisico di Catania
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  • Derek L. Buzasi, Florida Gulf Coast University
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  • Przemysław Mikołajczyk, University of Wroclaw
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  • Qian Sheng Zhang, CAS - National Astronomical Observatories, Chinese Academy of Sciences, University of Chinese Academy of Sciences
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  • Jian Wen Ou, Sun Yat-Sen University
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  • Tiago L. Campante, Instituto de Astrofísica e Ci ncias do Espa o, University of Porto, Departamento de Física e Astronomia
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  • Thaíise S. Rodrigues, Astronomical Observatory of Padua
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  • Benard Nsamba, University of Porto, Max Planck Institute for Astrophysics
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  • Diego Bossini, Instituto de Astrofísica e Ci ncias do Espa o, University of Porto
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  • Stephen R. Kane, University of California at Riverside
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  • Jia Mian Joel Ong, Yale University
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  • Mutlu Yildiz, Ege University
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  • Zeynep elik Orhan, Ege University
  • ,
  • Sibel rtel, Ege University
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  • Tao Wu, CAS - National Astronomical Observatories, Chinese Academy of Sciences
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  • Xinyi Zhang, CAS - National Astronomical Observatories, Chinese Academy of Sciences, University of Chinese Academy of Sciences
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  • Tanda Li, University of Sydney, University of Birmingham
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  • Sarbani Basu, Yale University
  • ,
  • Margarida S. Cunha, University of Porto, University of Birmingham
  • ,
  • Jørgen Christensen-Dalsgaard
  • William J. Chaplin, University of Birmingham

The Transiting Exoplanet Survey Satellite (TESS) is an all-sky survey mission aiming to search for exoplanets that transit bright stars. The high-quality photometric data of TESS are excellent for the asteroseismic study of solar-like stars. In this work, we present an asteroseismic analysis of the red-giant star HD 222076 hosting a long-period (2.4 yr) giant planet discovered through radial velocities. Solar-like oscillations of HD 222076 are detected around 203 μHz by TESS for the first time. Asteroseismic modeling, using global asteroseismic parameters as inputs, yields a determination of the stellar mass (), radius (), and age (7.4 2.7 Gyr), with precisions greatly improved from previous studies. The period spacing of the dipolar mixed modes extracted from the observed power spectrum reveals that the star is on the red-giant branch burning hydrogen in a shell surrounding the core. We find that the planet will not escape the tidal pull of the star and will be engulfed into it within about 800 Myr, before the tip of the red-giant branch is reached.

OriginalsprogEngelsk
Artikelnummer65
TidsskriftAstrophysical Journal
Vol/bind896
Nummer1
Antal sider10
ISSN0004-637X
DOI
StatusUdgivet - 2020

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