discoveryofastronglyrprocessenhancedextremelymetalpoorstarlamostj110901220754418
文献类型：期刊论文
| 作者 | Li Haining5 ; Aoki Wako4; Honda Satoshi3; Zhao Gang5; Christlieb Norbert2; Suda Takuma1
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| 刊名 | researchinastronomyandastrophysics
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| 出版日期 | 2015 |
| 卷号 | 15期号:8页码:1264 |
| ISSN号 | 1674-4527 |
| 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 ~ +1.16. The star is one of the newly discovered EMP stars identified from the LAMOST low-resolution spectroscopic survey and a highresolution 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+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 detailedmeasurements of neutroncapture elements among r–II stars at such low metallicity with Fe/H ? –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. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/44370]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.东京大学 2.Zentrum fur Astronomie der Universitat Heidelberg 3.兵库县立大学 4.National Astronomical Observatory of Japan 5.中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | Li Haining,Aoki Wako,Honda Satoshi,et al. discoveryofastronglyrprocessenhancedextremelymetalpoorstarlamostj110901220754418[J]. researchinastronomyandastrophysics,2015,15(8):1264. |
| APA | Li Haining,Aoki Wako,Honda Satoshi,Zhao Gang,Christlieb Norbert,&Suda Takuma.(2015).discoveryofastronglyrprocessenhancedextremelymetalpoorstarlamostj110901220754418.researchinastronomyandastrophysics,15(8),1264. |
| MLA | Li Haining,et al."discoveryofastronglyrprocessenhancedextremelymetalpoorstarlamostj110901220754418".researchinastronomyandastrophysics 15.8(2015):1264. |
入库方式： OAI收割
来源：国家天文台
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