CaII H&K emission distribution of similar to 120 000 F, G and K stars in LAMOST DR1
文献类型：期刊论文
| 作者 | Zhao, Jing-Kun1 ; Oswalt, Terry D.2; Chen, Yu-Qin1; Shi, Jian-Rong1; Tan, Ke-Feng1; Fang, Xiang-Song1; Zhao, Gang1; Yang, Ming1; Zhang, Yong3; Hou, Yong-Hui3
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2015-08-01 |
| 卷号 | 15期号:8页码:1282-1293 |
| 关键词 | stars: activity |
| 英文摘要 | We present chromospheric activity index S-HK measurements for 119 995 F, G and K stars with high signal-to-noise ratio (S/N > 80) spectra, extracted from LAMOST DR1 in SDSS g band. The index delta S for each of these stars is calculated by the difference between its S-HK value and the baseline determined from very inactive stars. The effect of metallicity on measurement of delta S varies with stellar T-eff. No evident Vaughan-Preston gap appears in our sample. The relation between delta S and vertical distance from the Galactic plane is determined for stars with T-eff < 5500K. Stars with higher delta S tend to be closer to the Galactic plane. Two open clusters in the DR1 sample, M45 and M67, exhibit the expected general trend that delta S decays with age. For stars with T-eff > 5500K, similar delta S levels appear in both young and old cluster stars, which supports Pace's suggestion that caution should be exercised when deriving the age of a single star by using its chromospheric activity. Finally, we investigate the relation between delta S and the kinematics of our sample. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360553400013 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5610]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Embry Riddle Aeronaut Univ, Daytona Beach, FL 32114 USA 3.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Jing-Kun,Oswalt, Terry D.,Chen, Yu-Qin,et al. CaII H&K emission distribution of similar to 120 000 F, G and K stars in LAMOST DR1[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(8):1282-1293. |
| APA | Zhao, Jing-Kun.,Oswalt, Terry D..,Chen, Yu-Qin.,Shi, Jian-Rong.,Tan, Ke-Feng.,...&Wang, Yue-Fei.(2015).CaII H&K emission distribution of similar to 120 000 F, G and K stars in LAMOST DR1.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(8),1282-1293. |
| MLA | Zhao, Jing-Kun,et al."CaII H&K emission distribution of similar to 120 000 F, G and K stars in LAMOST DR1".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.8(2015):1282-1293. |
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来源：国家天文台
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