A PRECISE ASTEROSEISMIC AGE AND RADIUS FOR THE EVOLVED SUN-LIKE STAR KIC 11026764
| Titre | A PRECISE ASTEROSEISMIC AGE AND RADIUS FOR THE EVOLVED SUN-LIKE STAR KIC 11026764 |
| Type de publication | Journal Article |
| Year of Publication | 2010 |
| Auteurs | Metcalfe, TS, Monteiro, M, Thompson, MJ, Molenda-Zakowicz, J, Appourchaux, T, Chaplin, WJ, Dogan, G, Eggenberger, P, Bedding, TR, Bruntt, H, Creevey, OL, Quirion, PO, Stello, D, Bonanno, A, Aguirre, VS, 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, Broomhall, AM, Elsworth, Y, Hekker, S, Huber, D, Mathur, S, New, R, Roxburgh, IW, Sato, KH, White, TR, Borucki, WJ, Koch, DG, Jenkins, JM |
| Journal | Astrophysical Journal |
| Volume | 723 |
| Pagination | 1583-1598 |
| Date Published | Nov |
| ISBN Number | 0004-637X |
| Numéro d'accès | WOS:000284093700050 |
| 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. |
