A PRECISE ASTEROSEISMIC AGE AND RADIUS FOR THE EVOLVED SUN-LIKE STAR KIC 11026764

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Metcalfe, TS (Author) Other; Monteiro, MJPFG (Author) FCUP; Thompson, MJ (Author) Other; Molenda Zakowicz, J (Author) Other; Appourchaux, T (Author) Other; Chaplin, WJ (Author) Other; Dogan, G (Author) Other; Eggenberger, P (Author) Other; Bedding, TR (Author) Other; Bruntt, H (Author) Other; Creevey, OL (Author) Other; O Quirion (Author) Other; Stello, D (Author) Other; Bonanno, A (Author) Other; Silva S Aguirre (Author) Other; Basu, S (Author) Other; Esch, L (Author) Other; Gai, N (Author) Other; di Mauro, MP (Author) Other; Kosovichev, AG (Author) Other; Kitiashvili, IN (Author) Other; Suarez, JC (Author) Other; Moya, A (Author) Other; Piau, L (Author) Other; Garcia, RA (Author) Other; Marques, JP (Author) Other; Frasca, A (Author) Other; Biazzo, K (Author) Other; Sousa, SG (Author) FCUP; Dreizler, S (Author) Other; Bazot, M (Author) Other; Karoff, C (Author) Other; Frandsen, S (Author) Other; Wilson, PA (Author) Other; Brown, TM (Author) Other; Christensen Dalsgaard, J (Author) Other; Gilliland, RL (Author) Other; Kjeldsen, H (Author) Other; Campante, TL (Author) Other; Fletcher, ST (Author) Other; Handberg, R (Author) Other; Regulo, C (Author) Other; Salabert, D (Author) Other; Schou, J (Author) Other; Verner, GA (Author) Other; Ballot, J (Author) Other; M Broomhall (Author) Other; Elsworth, Y (Author) Other; Hekker, S (Author) Other; Huber, D (Author) Other; Mathur, S (Author) Other; New, R (Author) Other; Roxburgh, IW (Author) Other; Sato, KH (Author) Other; White, TR (Author) Other; Borucki, WJ (Author) Other; Koch, DG (Author) Other; Jenkins, JM (Author) Other

Journal

Title: Astrophysical Journal

Vol. 723

Pages: 1583-1598

ISSN: 0004-637X

Publisher: American Astronomical Society

Indexing

ISI Web of Knowledge - 130 Citations

Scopus - 133 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Astronomy

Other information

Authenticus ID: P-003-11E

DOI: 10.1088/0004-637x/723/2/1583

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific