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Author(s): Metcalfe, TS
Monteiro, MJPFG
Thompson, MJ
Molenda Zakowicz, J
Appourchaux, T
Chaplin, WJ
Dogan, G
Eggenberger, P
Bedding, TR
Bruntt, H
Creevey, OL
O Quirion
Stello, D
Bonanno, A
Silva S Aguirre
Basu, S
Esch, L
Gai, N
di Mauro, MP
Kosovichev, AG
Kitiashvili, IN
Suarez, JC
Moya, A
Piau, L
Garcia, RA
Marques, JP
Frasca, A
Biazzo, K
Sousa, SG
Dreizler, S
Bazot, M
Karoff, C
Frandsen, S
Wilson, PA
Brown, TM
Christensen Dalsgaard, J
Gilliland, RL
Kjeldsen, H
Campante, TL
Fletcher, ST
Handberg, R
Regulo, C
Salabert, D
Schou, J
Verner, GA
Ballot, J
M Broomhall
Elsworth, Y
Hekker, S
Huber, D
Mathur, S
New, R
Roxburgh, IW
Sato, KH
White, TR
Borucki, WJ
Koch, DG
Jenkins, JM
Issue Date: 2010
Abstract: 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.
Subject: Astronomia, Física
Astronomy, Physical sciences
Scientific areas: Ciências exactas e naturais::Física
Natural sciences::Physical sciences
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FCUP - Artigo em Revista Científica Internacional

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