演化类太阳恒星 KIC 11026764 的精确星震学年龄与半径
太阳与恒星天体物理
2010-11-03 v1 地球与行星天体物理
摘要
开普勒任务的主要科学目标是提供太阳系邻域系外行星的普查，包括识别和表征宜居的类地行星。该任务的星震学能力正被用于通过目标恒星的类太阳振荡来确定其精确半径和年龄。Chaplin 等人（2010）发表了在科学运行前33.5天内监测的三颗明亮G型星的观测结果。其中一颗恒星，次巨星 KIC 11026764，展现出特征性的振荡频率模式，表明它已经显著演化。我们利用开普勒测光数据结合地面光谱数据，推导出了 KIC 11026764 的星震学性质估计。我们展示了这颗恒星的详细建模结果，采用了多种独立的代码和分析方法，试图同时满足星震学和光谱学约束。我们确定了 KIC 11026764 的半径和年龄，精度接近1%，半径的准确度接近2%，年龄的准确度接近15%。对该恒星的持续观测有望揭示额外的振荡频率，这将进一步改进其基本性质的测定。
引用
@article{arxiv.1010.4329,
title = {A precise asteroseismic age and radius for the evolved Sun-like star KIC 11026764},
author = {T. S. Metcalfe and M. J. P. F. G. Monteiro and M. J. Thompson and J. Molenda-Zakowicz and T. Appourchaux and W. J. Chaplin and G. Dogan and P. Eggenberger and T. R. Bedding and H. Bruntt and O. L. Creevey and P. -O. Quirion and D. Stello and A. Bonanno and V. Silva Aguirre and S. Basu and L. Esch and N. Gai and M. P. Di Mauro and A. G. Kosovichev and I. N. Kitiashvili and J. C. Suarez and A. Moya and L. Piau and R. A. Garcia and J. P. Marques and A. Frasca and K. Biazzo and S. G. Sousa and S. Dreizler and M. Bazot and C. Karoff and S. Frandsen and P. A. Wilson and T. M. Brown and J. Christensen-Dalsgaard and R. L. Gilliland and H. Kjeldsen and T. L. Campante and S. T. Fletcher and R. Handberg and C. Regulo and D. Salabert and J. Schou and G. A. Verner and J. Ballot and A. -M. Broomhall and Y. Elsworth and S. Hekker and D. Huber and S. Mathur and R. New and I. W. Roxburgh and K. H. Sato and T. R. White and W. J. Borucki and D. G. Koch and J. M. Jenkins},
journal= {arXiv preprint arXiv:1010.4329},
year = {2010}
}
备注
16 pages, 6 figures, 4 tables, ApJ in press