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| An alternative formation scenario for uranium-rich giants: engulfing an Earth-like planet | |
Xie, Dian1,2; Zhu, Chunhua1 ; Guo, Sufen1; Liu, Helei1; Lu, Guoliang1,2
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| 2023-07-24 | |
| Source Publication | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| ISSN | 0035-8711 |
| Volume | 524Issue:3Pages:3705-3711 |
| Contribution Rank | 2 |
| Abstract | The actinides, such as the uranium (U) element, are typically synthesized through the rapid neutron-capture process (r-process), which can occur in core-collapse supernovae or double neutron star mergers. There exist nine r-process giant stars exhibiting conspicuous U abundances, commonly referred to as U-rich giants. However, the origins of these U-rich giants remain ambiguous. We propose an alternative formation scenario for these U-rich giants whereby a red giant (RG) engulfs an Earth-like planet. To approximate the process of an RG engulfing an Earth-like planet, we employ an accretion model wherein the RG assimilates materials from said planet. Our findings demonstrate that this engulfment event can considerably enhance the presence of heavy elements originating from Earth-like planets on the surfaces of very metal-poor stars (Z = 0.00001), while its impact on solar-metallicity stars is comparatively modest. Importantly, the structural and evolutionary properties of both very metal-poor and solar-metallicity stars remain largely unaffected. Notably, our engulfment model effectively accounts for the observed U abundances in known U-rich giants. Furthermore, the evolutionary trajectories of U abundances on the surfaces of RGs subsequent to the engulfment of Earth-like planets encompass all known U-rich giants. Therefore, it is plausible that U-rich giants are formed when an RG engulfs an Earth-like planet. |
| Keyword | accretion accretion discs convection stars: chemically peculiar stars: evolution |
| DOI | 10.1093/mnras/stad2097 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | PROCESS ENHANCED STAR ; METAL-POOR STARS ; CONVECTIVE BOUNDARIES ; CHEMICAL-COMPOSITION ; WHITE-DWARFS ; STELLAR ; MODULES ; ABUNDANCES ; ENGULFMENT ; COMPANIONS |
| Funding Project | National Natural Science Foundation of China[12163005] ; National Natural Science Foundation of China[U2031204] ; National Natural Science Foundation of China[11863005] ; China Manned Space Project[CMS-CSST-2021-A10] ; Natural Science Foundation of Xinjiang[2021D01C075] ; Natural Science Foundation of Xinjiang[2020D01D85] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001050361400038 |
| Publisher | OXFORD UNIV PRESS |
| Funding Organization | National Natural Science Foundation of China ; China Manned Space Project ; Natural Science Foundation of Xinjiang |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5413 |
| Collection | 射电天文研究室_理论天体物理研究团组 |
| Corresponding Author | Zhu, Chunhua; Lu, Guoliang |
| Affiliation | 1.Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830017, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Xie, Dian,Zhu, Chunhua,Guo, Sufen,et al. An alternative formation scenario for uranium-rich giants: engulfing an Earth-like planet[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,524(3):3705-3711. |
| APA | Xie, Dian,Zhu, Chunhua,Guo, Sufen,Liu, Helei,&Lu, Guoliang.(2023).An alternative formation scenario for uranium-rich giants: engulfing an Earth-like planet.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,524(3),3705-3711. |
| MLA | Xie, Dian,et al."An alternative formation scenario for uranium-rich giants: engulfing an Earth-like planet".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 524.3(2023):3705-3711. |
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| Xie-2023-An alternat（2777KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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