TESS Asteroseismic Analysis of the Known Exoplanet Host Star HD 222076

被引：17

作者：

Jiang, Chen ^{[1
]}

Bedding, Timothy R. ^{[2
,3
]}

Stassun, Keivan G. ^{[4
,5
]}

Veras, Dimitri ^{[6
,7
]}

Corsaro, Enrico ^{[8
]}

Buzasi, Derek L. ^{[9
]}

Mikolajczyk, Przemyslaw ^{[10
]}

Zhang, Qian-sheng ^{[11
,12
,13
,14
]}

Ou, Jian-wen ^{[1
]}

Campante, Tiago L. ^{[15
,16
]}

Rodrigues, Thaiise S. ^{[17
]}

Nsamba, Benard ^{[15
,18
]}

Bossini, Diego ^{[15
]}

Kane, Stephen R. ^{[19
]}

Ong, Jia Mian Joel ^{[20
]}

Yildiz, Mutlu ^{[21
]}

Orhan, Zeynep Celik ^{[21
]}

Ortel, Sibel ^{[21
]}

Wu, Tao ^{[11
,12
,13
]}

Zhang, Xinyi ^{[11
,13
,14
]}

Li, Tanda ^{[2
,3
,22
]}

Basu, Sarbani ^{[20
]}

Cunha, Margarida S. ^{[15
,16
,22
]}

Christensen-Dalsgaard, Jorgen ^{[3
]}

Chaplin, William J. ^{[3
,22
]}

机构：

[1] Sun Yat Sen Univ, Sch Phys & Astron, 135 Xingang Xi Rd, Guangzhou 510275, Peoples R China

[2] Univ Sydney, Sch Phys, Sydney Inst Astron SIfA, Sydney, NSW 2006, Australia

[3] Aarhus Univ, Stellar Astrophys Ctr SAC, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

[4] Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Ln, Nashville, TN 37235 USA

[5] Vanderbilt Initiat Data Intens Astrophys VIDA, 6301 Stevenson Ctr Ln, Nashville, TN 37235 USA

[6] Univ Warwick, Ctr Exoplanets & Habitabil, Coventry CV4 7AL, W Midlands, England

[7] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[8] INAF Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy

[9] Florida Gulf Coast Univ, Dept Chem & Phys, 10501 FGCU Blvd S, Ft Myers, FL 33965 USA

[10] Univ Wroclaw, Astron Inst, Mikolaja Kopernika 11, PL-51622 Wroclaw, Poland

[11] Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China

[12] Chinese Acad Sci, Ctr Astron Megasci, 20A Datun Rd, Beijing 100012, Peoples R China

[13] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China

[14] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[15] Univ Porto, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Porto, Portugal

[16] Univ Porto, Dept Fis & Astron, Fac Ciencias, Rua Campo Alegre S-N, P-4169007 Porto, Portugal

[17] Osservatorio Astron Padova INAF, Vicolo Osservatorio 5, I-35122 Padua, Italy

[18] Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany

[19] Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA

[20] Yale Univ, Dept Astron, POB 208101, New Haven, CT 06520 USA

[21] Ege Univ, Sci Fac, Dept Astron & Space Sci, TR-35100 Izmir, Turkey

[22] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

来源：

ASTROPHYSICAL JOURNAL | 2020年 / 896卷 / 01期

基金：

欧盟地平线“2020”; 澳大利亚研究理事会; 新加坡国家研究基金会; 欧洲研究理事会; 中国国家自然科学基金;

关键词：

SOLAR-LIKE OSCILLATIONS; KEPLER; PLANETS; COMPANIONS; RADIATION; GIANTS; MASSES; RADII; TIME;

D O I：

10.3847/1538-4357/ab8f29

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 inputs, yields a determination of the stellar mass (M-* = 1.12 +/- 0.12 M-circle dot), radius (R-* = 4.34 +/- 0.21 R-circle dot), 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.

引用

页数：10

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