A NON-LTE STUDY OF SILICON ABUNDANCES IN GIANT STARS FROM THE Si I INFRARED LINES IN THE zJ-BAND
文献类型：期刊论文
| 作者 | Tan, Kefeng1 ; Shi, Jianrong1; Takada-Hidai, Masahide2; Takeda, Yoichi3; Zhao, Gang1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2016-05-20 |
| 卷号 | 823期号:1 |
| 关键词 | Galaxy: evolution stars: abundances stars: atmospheres stars: late-type |
| 英文摘要 | We investigate the feasibility of Si I infrared (IR) lines as Si abundance indicators for giant stars. We find that Si abundances obtained from the Si I IR lines based on the local thermodynamic equilibrium (LTE) analysis show large line-to-line scatter (mean value of 0.13 dex), and are higher than those from the optical lines. However, when non-LTE effects are taken into account, the line-to-line scatter reduces significantly (mean value of 0.06 dex), and the Si abundances are consistent with those from the optical lines. The typical average non-LTE correction of [Si/Fe] for our sample stars is about -0.35 dex. Our results demonstrate that the Si I IR lines could be reliable abundance indicators, provided that the non-LTE effects are properly taken into account. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000377216300036 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5344]  |
| 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.Tokai Univ, Liberal Arts Educ Ctr, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan 3.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan |
| 推荐引用方式 GB/T 7714 | Tan, Kefeng,Shi, Jianrong,Takada-Hidai, Masahide,et al. A NON-LTE STUDY OF SILICON ABUNDANCES IN GIANT STARS FROM THE Si I INFRARED LINES IN THE zJ-BAND[J]. ASTROPHYSICAL JOURNAL,2016,823(1). |
| APA | Tan, Kefeng,Shi, Jianrong,Takada-Hidai, Masahide,Takeda, Yoichi,&Zhao, Gang.(2016).A NON-LTE STUDY OF SILICON ABUNDANCES IN GIANT STARS FROM THE Si I INFRARED LINES IN THE zJ-BAND.ASTROPHYSICAL JOURNAL,823(1). |
| MLA | Tan, Kefeng,et al."A NON-LTE STUDY OF SILICON ABUNDANCES IN GIANT STARS FROM THE Si I INFRARED LINES IN THE zJ-BAND".ASTROPHYSICAL JOURNAL 823.1(2016). |
入库方式： OAI收割
来源：国家天文台
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