Discovery of a strongly r-process enhanced extremely metal-poor star LAMOST J110901.22+075441.8
文献类型：期刊论文
| 作者 | Li, Hai-Ning1 ; Aoki, Wako2,3; Honda, Satoshi4; Zhao, Gang1; Christlieb, Norbert5; Suda, Takuma6
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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:1264-1274 |
| 关键词 | star: abundances stars: Population II nucleosynthesis |
| 英文摘要 | We report the discovery of an extremely metal-poor (EMP) giant, LAMOST J110901.22+075441.8, which exhibits a large excess of r-process elements with [Eu/Fe] similar to +1.16. The star is one of the newly discovered EMP stars identified from the LAMOST low-resolution spectroscopic survey and a high-resolution follow-up observation with the Subaru Telescope. Stellar parameters and elemental abundances have been determined from the Subaru spectrum. Accurate abundances for a total of 23 elements including 11 neutron-capture elements from Sr through Dy have been derived for LAMOST J110901.22+075441.8. The abundance pattern of LAMOST J110901.22+075441.8 in the range of C through Zn is in line with the "normal" population of EMP halo stars, except that it shows a notable underabundance in carbon. The heavy element abundance pattern of LAMOST J110901.22 vertical bar 075441.8 is in agreement with other well studied cool r-II metal-poor giants such as CS 22892-052 and CS 31082-001. The abundances of elements in the range from Ba through Dy match the scaled solar r-process pattern well. LAMOST J110901.22+075441.8 provides the first detailed measurements of neutron-capture elements among r-II stars at such low metallicity with [Fe/H] less than or similar to -3.4, and exhibits similar behavior as other r-II stars in the abundance ratio of Zr/Eu as well as Sr/Eu and Ba/Eu. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360553400011 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5612]  |
| 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.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 3.Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, Mitaka, Tokyo 1818588, Japan 4.Univ Hyogo, Ctr Astron, Sayo, Hyogo 6795313, Japan 5.Heidelberg Univ, Zentrum Astron, D-69117 Heidelberg, Germany 6.Univ Tokyo, Res Ctr Early Universe, Bunkyo Ku, Tokyo 1130033, Japan |
| 推荐引用方式 GB/T 7714 | Li, Hai-Ning,Aoki, Wako,Honda, Satoshi,et al. Discovery of a strongly r-process enhanced extremely metal-poor star LAMOST J110901.22+075441.8[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(8):1264-1274. |
| APA | Li, Hai-Ning,Aoki, Wako,Honda, Satoshi,Zhao, Gang,Christlieb, Norbert,&Suda, Takuma.(2015).Discovery of a strongly r-process enhanced extremely metal-poor star LAMOST J110901.22+075441.8.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(8),1264-1274. |
| MLA | Li, Hai-Ning,et al."Discovery of a strongly r-process enhanced extremely metal-poor star LAMOST J110901.22+075441.8".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.8(2015):1264-1274. |
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来源：国家天文台
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