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TESS Asteroseismic Analysis of the Known Exoplanet Host Star HD 222076 | | Chen Jiang
; Timothy R. Bedding
; Keivan G. Stassun
; Dimitri Veras
; Enrico Corsaro
; Derek L. Buzasi
; Przemysław Mikołajczyk
; Qian-sheng
; Zhang
; Jian-wen
; Tiago L. Campante
; Thaíse S. Rodrigues
; Benard Nsamba
; Diego Bossini
; Stephen R. Kane
; Jia Mian Joel Ong
; Mutlu Yıldız
; Zeynep Çeiik Orhan
; Sibel Örtel
; Tao Wu
; Xinyi Zhang
; Tanda Li
; Sarbani Basu
; Margarida S. Cunha
; Jørgen Christensen-Dalsgaard
; William J. Chaplin
; | | Date: |
1 May 2020 | | Abstract: | 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 $203 , mu$Hz by TESS for the first time. Asteroseismic modeling, using
global asteroseismic parameters as input, yields a determination of the stellar
mass ($M_star = 1.12 pm 0.12, M_odot$), radius ($R_star = 4.34 pm
0.21,R_odot$), and age ($7.4 pm 2.7,$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 be engulfed into it
within about $800,$Myr, before the tip of the red-giant branch is reached. | | Source: | arXiv, 2005.0272 | | Services: | Forum | Review | PDF | Favorites | |
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