Dynamical mass loss at the end of thermally pulsating asymptotic giant branch stars
文献类型：期刊论文
| 作者 | Cui, Yingzhen7; Wang, Song3,7; Meng XC(孟祥存)1; Liu, Jifeng3,5,6,7; Ma, Shuguo7; Zhao, Weitao2,4 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2026-03-17 |
| 卷号 | 707 |
| 关键词 | stars: AGB and post-AGB stars: mass-loss |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202556962 |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | Context. The thermally pulsating asymptotic giant branch (TP-AGB) phase plays a key role in the evolution of low- to intermediate-mass stars because it drives the mass loss that influences their final stages and contributes to galactic chemical enrichment. However, the mechanisms behind the mass loss, particularly at the end of the AGB phase, are still not well understood. Aims. We investigated the relationship between the stellar parameters and envelope dynamics during the TP-AGB phase with the aim of evaluating whether dynamical instabilities in the envelope can act as a possible mass-loss mechanism. Methods. We used the hydrodynamics method in MESA to simulate the dynamical pulsations and resulting mass loss during the TP-AGB phase of a star that evolved from a 1.5 M-circle dot zero-age main-sequence. Results. Our simulations reproduced the dynamical pulsation behavior of stars during the TP-AGB phase, demonstrating that the envelope mass is a key factor governing pulsational properties. As the envelope mass decreases, both the pulsation period and radial amplitude increase, as is consistent with observational trends. For the 1.5 M-circle dot model, once the envelope mass declines to approximately 0.25 M-circle dot, the model enters a regime of violent pulsations, potentially ejecting the remaining envelope within a few hundred years. Conclusions. We suggest that the instability can act as the dominant mass-loss mechanism at the end of the TP-AGB phase, marking a rapid transitional stage toward the post-AGB phase. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | SYNTHETIC PHOTOMETRY ; AGB STARS ; CONVECTIVE BOUNDARIES ; EVOLUTION ; STELLAR ; MODULES ; MODELS ; INSTABILITY ; ROTATION ; IV. |
| 资助项目 | N/A |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001716661800001 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | [12273057/12588202/11833002/12090042/12288102/12333008/11973080] ; [2023YFA1607901/2021YFA1600403] ; [XDB1160302/XDB1160303/XDB1160000] ; [202302AN360001] ; [202401BC070007] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29040]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 通讯作者 | Cui, Yingzhen |
| 作者单位 | 1.International Centre of Supernovae (ICESUN), Yunnan Key Laboratory of Supernova Research, Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, China; 2.Center for Theoretical Physics, Henan Normal University, Xinxiang 453007, China 3.Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, China; 4.School of Physics, Henan Normal University, Xinxiang 453007, China; 5.New Cornerstone Science Laboratory, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; 6.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China; 7.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China; |
| 推荐引用方式 GB/T 7714 | Cui, Yingzhen,Wang, Song,Meng XC,et al. Dynamical mass loss at the end of thermally pulsating asymptotic giant branch stars[J]. ASTRONOMY & ASTROPHYSICS,2026,707. |
| APA | Cui, Yingzhen,Wang, Song,孟祥存,Liu, Jifeng,Ma, Shuguo,&Zhao, Weitao.(2026).Dynamical mass loss at the end of thermally pulsating asymptotic giant branch stars.ASTRONOMY & ASTROPHYSICS,707. |
| MLA | Cui, Yingzhen,et al."Dynamical mass loss at the end of thermally pulsating asymptotic giant branch stars".ASTRONOMY & ASTROPHYSICS 707(2026). |
入库方式： OAI收割
来源：云南天文台
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