Using Lithium and Beryllium to Study the Structure and Evolution of Rotating Stars: The Spite Plateau of Halo Stars
文献类型：期刊论文
| 作者 | Yang, Wuming3; Dou, Shuya3; Meng XC(孟祥存)1; Wu, Yaqian2; Bi, Shaolan3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2026-04-01 |
| 卷号 | 1000期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae4d0f |
| 产权排序 | 第2完成单位 |
| 文献子类 | Article |
| 英文摘要 | The observed lithium (Li) abundance of Galactic halo stars mainly falls within the range of 2.0-2.4 dex. This nearly constant value, known as the Spite plateau, is approximately a factor of 3 lower than the value predicted from cosmic microwave background measurements and standard Big Bang nucleosynthesis (BBN) calculations. This discrepancy-referred to as the cosmological Li problem-is considered a potential indication of new physics or astrophysical processes. We employed models incorporating gravitational settling, diffusion, rotation, and magnetic fields to explain the Spite plateau. The rotating models predict that Li abundances in stars with ages of roughly 8-13 Gyr and effective temperatures between 6400 and 5900 K generally fall within 2.0-2.4 dex, forming a well-defined Li plateau, followed by a sharp decline in Li abundance down to about 5200 K. The Li plateau results from the combined effects of variations in convection zone depth, gravitational settling, diffusion, rotation, and magnetic fields. For red giant branch stars with Teff less than or similar to 5200 K, the rotating models predict another Li plateau with an abundance of about 1.0 dex. These results are in good agreement with observations. Moreover, the initial Li abundance of 2.72 dex adopted in the models matches the BBN prediction, implying that the Li problem arises from stellar Li depletion. Furthermore, the rotating models also reproduce the Li and Be distributions of the sample that exhibit the Spite plateau meltdown and Be deviation. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | ANGULAR-MOMENTUM TRANSPORT ; SOLAR MODELS ; PRIMORDIAL LITHIUM ; COSMOLOGICAL LITHIUM ; GALACTIC EVOLUTION ; WMAP OBSERVATIONS ; MAIN-SEQUENCE ; TURNOFF STARS ; II STARS ; ABUNDANCES |
| 资助项目 | NSFC; National Key R&D Program of China[2021YFA1600403]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB1160303]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB1160000]; International Centre of Supernovae; Yunnan Key Laboratory[202302AN360001]; Yunnan Fundamental Research Projects[202401BC070007]; Yunnan Fundamental Research Projects[202305AB350003]; China Manned Space Project[CMS-CSST-2025-A12]; China Manned Space Project[CMS-CSST-2025-A13]; China Manned Space Project[CMS-CSST-2025-A15] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001726579300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | NSFC ; National Key R&D Program of China[2021YFA1600403] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB1160303, XDB1160000] ; International Centre of Supernovae ; Yunnan Key Laboratory[202302AN360001] ; Yunnan Fundamental Research Projects[202401BC070007, 202305AB350003] ; China Manned Space Project[CMS-CSST-2025-A12, CMS-CSST-2025-A13, CMS-CSST-2025-A15] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29082]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 通讯作者 | Yang, Wuming |
| 作者单位 | 1.International Centre of Supernovae, Yunnan Key Laboratory of Supernova Research, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China; 2.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing, 100101, People’s Republic of China 3.School of Physics and Astronomy, Beijing Normal University, Beijing 100875, People’s Republic of China; yangwuming@bnu.edu.cn; |
| 推荐引用方式 GB/T 7714 | Yang, Wuming,Dou, Shuya,Meng XC,et al. Using Lithium and Beryllium to Study the Structure and Evolution of Rotating Stars: The Spite Plateau of Halo Stars[J]. ASTROPHYSICAL JOURNAL,2026,1000(2). |
| APA | Yang, Wuming,Dou, Shuya,孟祥存,Wu, Yaqian,&Bi, Shaolan.(2026).Using Lithium and Beryllium to Study the Structure and Evolution of Rotating Stars: The Spite Plateau of Halo Stars.ASTROPHYSICAL JOURNAL,1000(2). |
| MLA | Yang, Wuming,et al."Using Lithium and Beryllium to Study the Structure and Evolution of Rotating Stars: The Spite Plateau of Halo Stars".ASTROPHYSICAL JOURNAL 1000.2(2026). |
入库方式： OAI收割
来源：云南天文台
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