The Impact of Inelastic Collisions with Hydrogen on NLTE Copper Abundances in Metal-poor Stars
文献类型：期刊论文
| 作者 | Xu, Xiaodong1; Shi, Jianrong2,3 ; Wang, Xiaofeng1,4,5
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2022-09-01 |
| 卷号 | 936期号:1页码:8 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac84d9 |
| 英文摘要 | We investigate the non-local thermodynamic equilibrium (non-LTE, hereafter NLTE) analysis for Cu i lines with the updated model atom that includes quantum-mechanical rate coefficients of Cu + H and Cu+ + H- inelastic collisions from the recent study of Belyaev et al. The influence of these data on NLTE abundance determinations has been performed for six metal-poor stars in a metallicity range of -2.59 dex <= [Fe/H] <= -0.95 dex. For Cu i lines, the application of accurate atomic data leads to a decrease in the departure from LTE and lower copper abundances compared to that obtained with Drawin's theoretical approximation. To verify our adopted copper atomic model, we also derived the LTE copper abundances of Cu ii lines for the sample stars. A consistent copper abundance from the Cu i (NLTE) and Cu ii (LTE) lines has been obtained, which indicates the reliability of our copper atomic model. It is noted that the [Cu/Fe] ratios increase with increasing metallicity when similar to-2.0 dex < [Fe/H] < similar to-1.0 dex, favoring a secondary (metallicity-dependent) copper production. |
| WOS关键词 | MULTILEVEL RADIATIVE-TRANSFER ; GALACTIC CHEMICAL EVOLUTION ; LAMBDA ITERATION METHOD ; ATOM-ATOM COLLISIONS ; NEUTRON-CAPTURE ; CROSS-SECTIONS ; MASSIVE STARS ; CU-I ; NUCLEOSYNTHESIS ; MODELS |
| 资助项目 | Scholar Program of Beijing Academy of Science and Technology[DZ: BS202002] ; China Manned Space Project[CMS-CSST-2021B05] ; National Key R&D Program of China[2019YFA0405502] ; National Natural Science Foundation of China[12090040] ; National Natural Science Foundation of China[12090044] ; National Natural Science Foundation of China[11833006] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000844313400001 |
| 资助机构 | Scholar Program of Beijing Academy of Science and Technology ; Scholar Program of Beijing Academy of Science and Technology ; China Manned Space Project ; China Manned Space Project ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scholar Program of Beijing Academy of Science and Technology ; Scholar Program of Beijing Academy of Science and Technology ; China Manned Space Project ; China Manned Space Project ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scholar Program of Beijing Academy of Science and Technology ; Scholar Program of Beijing Academy of Science and Technology ; China Manned Space Project ; China Manned Space Project ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scholar Program of Beijing Academy of Science and Technology ; Scholar Program of Beijing Academy of Science and Technology ; China Manned Space Project ; China Manned Space Project ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/87613]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Shi, Jianrong |
| 作者单位 | 1.Beijing Acad Sci & Technol, Beijing Planetarium, Beijing 100044, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 5.Tsinghua Univ, Tsinghua Ctr Astrophys THCA, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Xiaodong,Shi, Jianrong,Wang, Xiaofeng. The Impact of Inelastic Collisions with Hydrogen on NLTE Copper Abundances in Metal-poor Stars[J]. ASTROPHYSICAL JOURNAL,2022,936(1):8. |
| APA | Xu, Xiaodong,Shi, Jianrong,&Wang, Xiaofeng.(2022).The Impact of Inelastic Collisions with Hydrogen on NLTE Copper Abundances in Metal-poor Stars.ASTROPHYSICAL JOURNAL,936(1),8. |
| MLA | Xu, Xiaodong,et al."The Impact of Inelastic Collisions with Hydrogen on NLTE Copper Abundances in Metal-poor Stars".ASTROPHYSICAL JOURNAL 936.1(2022):8. |
入库方式： OAI收割
来源：国家天文台
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