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Article Dans Une Revue The Astrophysical Journal Année : 2010

A Precise Asteroseismic Age and Radius for the Evolved Sun-like Star KIC 11026764

1 High Altitude Observatory, National Center for Atmospheric Research
2 Universidade do Porto = University of Porto
3 University of Sheffield [Sheffield]
4 Astronomical Institute, University of Wroclaw
5 IAS - Institut d'astrophysique spatiale
6 School of Physics and Astronomy, University of Birmingham
7 DASC - Danish AsteroSeismology Centre
8 Observatoire Astronomique de l'Université de Genève
9 SIfA - Sydney Institute for Astronomy
10 Observatoire de Paris
11 IAC - Instituto de Astrofisica de Canarias
12 CSA - Canadian Space Agency
13 INAF-OACt - INAF-Osservatorio Astrofisico di Catania
14 MPA - Max-Planck-Institut für Astrophysik
15 Department of Astronomy, Yale University
16 IASF-Roma - Istituto di Astrofisica Spaziale e Fisica Cosmica
17 HEPL, Stanford University, Stanford
18 Center for Turbulence Research, Stanford University
19 IAA - Instituto de Astrofísica de Andalucía
20 Laboratorio de Astrofísica, CAB (CSIC-INTA), Villanueva de la Cañada, Madrid
21 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
22 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
23 OAA - INAF - Osservatorio Astrofisico di Arcetri
24 Georg-August-University = Georg-August-Universität Göttingen
25 Nordic Optical Telescope
26 Las Cumbres Observatory, Goleta
27 STScI - Space Telescope Science Institute
28 Materials Engineering Research Institute, Sheffield Hallam University, Sheffield
29 School of Mathematical Sciences, Queen Mary Unversity of London
30 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
31 National Aeronautics and Space Administration, Ames Research Center
32 SETI Institute, NASA Ames Research Center, Moffett Field
H. Bruntt
  • Fonction : Auteur

Résumé

The primary science goal of the Kepler Mission is to provide a census of exoplanets in the solar neighborhood, including the identification and characterization of habitable Earth-like planets. The asteroseismic capabilities of the mission are being used to determine precise radii and ages for the target stars from their solar-like oscillations. Chaplin et al. published observations of three bright G-type stars, which were monitored during the first 33.5 days of science operations. One of these stars, the subgiant KIC 11026764, exhibits a characteristic pattern of oscillation frequencies suggesting that it has evolved significantly. We have derived asteroseismic estimates of the properties of KIC 11026764 from Kepler photometry combined with ground-based spectroscopic data. We present the results of detailed modeling for this star, employing a variety of independent codes and analyses that attempt to match the asteroseismic and spectroscopic constraints simultaneously. We determine both the radius and the age of KIC 11026764 with a precision near 1%, and an accuracy near 2% for the radius and 15% for the age. Continued observations of this star promise to reveal additional oscillation frequencies that will further improve the determination of its fundamental properties.

Dates et versions

hal-03786669 , version 1 (23-09-2022)

Identifiants

Citer

Travis S. Metcalfe, M. J. P. F. G. Monteiro, Michael J. Thompson, Joanna Molenda-Zakowicz, Thierry Appourchaux, et al.. A Precise Asteroseismic Age and Radius for the Evolved Sun-like Star KIC 11026764. The Astrophysical Journal, 2010, 723, pp.1583-1598. ⟨10.1088/0004-637X/723/2/1583⟩. ⟨hal-03786669⟩
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