Cosmological Insights into the Early Accretion of r-process-enhanced Stars. I. A Comprehensive Chemodynamical Analysis of LAMOST J1109+0754
文献类型：期刊论文
| 作者 | Mardini,Mohammad K.6,10; Placco,Vinicius M.11; Meiron,Yohai5; Ishchenko,Marina9; Avramov,Branislav4; Mazzarini,Matteo4; Berczik,Peter3,4,9; Sedda,Manuel Arca4; Beers,Timothy C.1,2; Frebel,Anna1,12 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 903期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Chemically peculiar stars Population III stars R-process Stellar kinematics Chemical abundances Stellar dynamics Orbits Galaxy dynamics |
| DOI | 10.3847/1538-4357/abbc13 |
| 英文摘要 | Abstract This study presents a comprehensive chemodynamical analysis of LAMOST J1109+0754, a bright (V?=?12.8), extremely metal-poor ([Fe/H]?=??3.17) star, with a strong r-process enhancement ([Eu/Fe]?=?+0.94 ± 0.12). Our results are based on the 7D measurements supplied by Gaia and the chemical composition derived from a high-resolution (R?～?110,000), high signal-to-noise ratio ( optical spectrum obtained by the 2.4 m Automated Planet Finder Telescope at Lick Observatory. We obtain chemical abundances of 31 elements (from lithium to thorium). The abundance ratios ([X/Fe]) of the light elements (Z?≤?30) suggest a massive Population III progenitor in the 13.4–29.5 M⊙ mass range. The heavy-element (30? |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-903-2-ABBC13 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62287]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhao,Gang |
| 作者单位 | 1.JINA Center for the Evolution of the Elements (JINA-CEE), USA 2.Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA 3.National Astronomical Observatories and Key Laboratory of Computational Astrophysics, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China 4.Astronomisches Rechen Institut—Zentrum für Astronomie der Universit?t Heidelberg, M?nchhofstrasse 12-14, D-69120 Heidelberg, Germany 5.Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada 6.Institute of Space Sciences, Shandong University, Weihai 264209, People’s Republic of China 7.Department of Applied Physics and Astronomy, University of Sharjah, Sharjah, United Arab Emirates 8.Sharjah Academy for Astronomy, Space Sciences and Technology, University of Sharjah, Sharjah, United Arab Emirates 9.Main Astronomical Observatory, National Academy of Sciences of Ukraine, 27 Akademika Zabolotnoho St., 03143 Kyiv, Ukraine 10.Key Lab of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China gzhao@nao.cas.cn |
| 推荐引用方式 GB/T 7714 | Mardini,Mohammad K.,Placco,Vinicius M.,Meiron,Yohai,et al. Cosmological Insights into the Early Accretion of r-process-enhanced Stars. I. A Comprehensive Chemodynamical Analysis of LAMOST J1109+0754[J]. The Astrophysical Journal,2020,903(2). |
| APA | Mardini,Mohammad K..,Placco,Vinicius M..,Meiron,Yohai.,Ishchenko,Marina.,Avramov,Branislav.,...&Zhao,Gang.(2020).Cosmological Insights into the Early Accretion of r-process-enhanced Stars. I. A Comprehensive Chemodynamical Analysis of LAMOST J1109+0754.The Astrophysical Journal,903(2). |
| MLA | Mardini,Mohammad K.,et al."Cosmological Insights into the Early Accretion of r-process-enhanced Stars. I. A Comprehensive Chemodynamical Analysis of LAMOST J1109+0754".The Astrophysical Journal 903.2(2020). |
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来源：国家天文台
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