Survey of Li-rich Giants among Kepler and LAMOST Fields: Determination of Li-rich Giants’ Evolutionary Phase
文献类型：期刊论文
| 作者 | Singh,Raghubar3,4; Reddy,Bacham E.4; Bharat Kumar,Yerra2; Antia,H. M.1 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2019-06-11 |
| 卷号 | 878期号:1 |
| 关键词 | asteroseismology stars: abundances stars: evolution stars: late-type stars: low-mass |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ab2599 |
| 英文摘要 | Abstract In this Letter, we report the discovery of 24 new super Li-rich (A(Li)?≥?3.2) giants of He-core burning phase at the red clump region. Results are based on a systematic search of a large sample of about 12,500 giants common to the LAMOST spectroscopic and Kepler time-resolved photometric surveys. The two key parameters derived from Kepler data are an average period spacing (Δp) between l?=?1 mixed gravity-dominated g-modes and average large frequency-separation (Δν) l?=?0 acoustic p-modes, which suggest all the Li-rich giants are in the He-core burning phase. This is the first unbiased survey subjected to a robust technique of asteroseismic analysis to unambiguously determine the evolutionary phase of Li-rich giants. The results provide strong evidence that the Li enhancement phenomenon is associated with giants in the He-core burning phase post He-flash, rather than any other phase on the red giant branch with an inert He-core surrounded by a H-burning shell. |
| 语种 | 英语 |
| WOS记录号 | IOP:2041-8205-878-1-AB2599 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/28921]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Tata Institute of Fundamental Research Mumbai, India 2.Key Laboratory for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China 3.Pondicherry University R. V. Nagara, Kala Pet, 605014, Puducherry, India 4.Indian Institute of Astrophysics 560034, 100ft road Koramangala, Bangalore, India; raghubar2015@gmail.com, raghubar.singh@iiap.res.in |
| 推荐引用方式 GB/T 7714 | Singh,Raghubar,Reddy,Bacham E.,Bharat Kumar,Yerra,et al. Survey of Li-rich Giants among Kepler and LAMOST Fields: Determination of Li-rich Giants’ Evolutionary Phase[J]. The Astrophysical Journal Letters,2019,878(1). |
| APA | Singh,Raghubar,Reddy,Bacham E.,Bharat Kumar,Yerra,&Antia,H. M..(2019).Survey of Li-rich Giants among Kepler and LAMOST Fields: Determination of Li-rich Giants’ Evolutionary Phase.The Astrophysical Journal Letters,878(1). |
| MLA | Singh,Raghubar,et al."Survey of Li-rich Giants among Kepler and LAMOST Fields: Determination of Li-rich Giants’ Evolutionary Phase".The Astrophysical Journal Letters 878.1(2019). |
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来源：国家天文台
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