Stellar parameters of main sequence turn-off star candidates observed with LAMOST and Kepler
文献类型：期刊论文
| 作者 | Wu, Ya-Qian1; Xiang, Mao-Sheng2; Zhang, Xian-Fei1; Li, Tan-Da2 ; Bi, Shao-Lan1; Liu, Xiao-Wei3; Fu, Jian-Ning1; Huang, Yang3; Tian, Zhi-Jia3; Liu, Kang1
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2017 |
| 卷号 | 17期号:1 |
| 关键词 | stars: fundamental parameters stars: evolution stars: asteroseismology |
| 英文摘要 | Main sequence turn-off (MSTO) stars have advantages as indicators of Galactic evolution since their ages can be robustly estimated from atmospheric panuneters. Hundreds of thousands of MSTO stars have been selected from the LAMOST Galactic survey to study the evolution of the Galaxy, and it is vital to derive accurate stellar parameters. In this work, we select 150 MSTO star candidates from the MSTO star sample of Xiang that have asteroseismic parameters and determine accurate stellar parameters for these stars by combining asteroseismic parameters deduced froth Kepler photometry and atmospheric parameters deduced from LAMOST spectra. With this simple, we examine the age determination as well as the contamination rate of the MSTO star sample. A comparison of age between this work and Xiang shows a mean difference of 0.53 Gyr (7%) and a dispersion of 2.71 Gyr (28%). The results show that 79 of the candidates are MSTO stars, while the others are contaminations from either main sequence or sub-giant stars. The contamination rate for the oldest stars is much higher than that for younger stars. The main cause for the high contamination rate is found to be the relatively large systematic bias in the LAMOST surface gravity estimates. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SOLAR-LIKE OSCILLATIONS ; 1ST DATA RELEASE ; RED GIANTS ; ELEMENT DIFFUSION ; EVOLUTION ; ASTEROSEISMOLOGY ; METALLICITY ; ROTATION ; CLUSTERS ; TEMPERATURE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000396489000005 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8260]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Ya-Qian,Xiang, Mao-Sheng,Zhang, Xian-Fei,et al. Stellar parameters of main sequence turn-off star candidates observed with LAMOST and Kepler[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(1). |
| APA | Wu, Ya-Qian.,Xiang, Mao-Sheng.,Zhang, Xian-Fei.,Li, Tan-Da.,Bi, Shao-Lan.,...&Li Tanda.(2017).Stellar parameters of main sequence turn-off star candidates observed with LAMOST and Kepler.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(1). |
| MLA | Wu, Ya-Qian,et al."Stellar parameters of main sequence turn-off star candidates observed with LAMOST and Kepler".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.1(2017). |
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来源：国家天文台
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