Asteroseismology and Dynamics Reveal Interior Structure and Coeval Evolution in the Triply Post-main-sequence System DG Leo
文献类型：期刊论文
| 作者 | Li P(李平)1,3; Liao WP(廖文萍)1,3; Qian, Sheng-Bang2; Zhu LY(朱俐颖)1,3; Zhang J(张嘉)1; Sun, Qi-Bin2; Meng FB(孟芳斌)1,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 994期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae14fe |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | delta Scuti stars in binary or multiple systems serve as crucial probes for studying stellar pulsation and evolution. However, many such systems are not ideal for asteroseismology due to uncertainties in mass transfer with close companions and the challenges of dynamically measuring all components' physical properties. The triple system DG Leo, comprising an inner binary and a distant delta Scuti star, is an ideal target due to its well-separated pulsator. By combining new TESS photometry with archival spectroscopy, our dynamical analysis shows that the system's three components share similar masses, radii, and luminosities within errors, occupying coincident Hertzsprung-Russell diagram positions, indicative of coeval evolution. By fitting seven observed delta Scuti frequencies through asteroseismic modeling with dynamically constrained theoretical grids, we simultaneously trace the pulsating star's evolution and constrain the triple system's evolutionary stage, with the derived fundamental parameters showing consistency with the dynamical solutions. Our analysis reveals that all three components of DG Leo are in the post-main-sequence phase, with a system age of 0.7664-0.1258+0.1402 Gyr. Additionally, the delta Scuti component shows multiple nonradial modes with significant mixed-character frequencies, providing precise constraints on its convective core extent ( Rcz/R=0.0562-0.0021+0.0137 ). |
| 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 | AMPLITUDE DELTA-SCUTI ; BINARY STAR LIGHT ; ALGOL-TYPE SYSTEM ; ECLIPSING BINARIES ; COMBINATION FREQUENCIES ; CHEMICAL-COMPOSITION ; PULSATION ; MODULES ; OSCILLATIONS ; CONVECTION |
| 资助项目 | MOST divided by National Key Research and Development Program of China (NKPs)[2022YFE0127300] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001621843800001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Key Research and Development Program of China (NKPs)[2022YFE0127300] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28743]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 通讯作者 | Liao WP(廖文萍) |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, People’s Republic of China; liaowp@ynao.ac.cn; 2.School of Physics and Astronomy, Yunnan University, Kunming 650091, People’s Republic of China 3.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd., Huairou District, Beijing 101408, People’s Republic of China; |
| 推荐引用方式 GB/T 7714 | Li P,Liao WP,Qian, Sheng-Bang,et al. Asteroseismology and Dynamics Reveal Interior Structure and Coeval Evolution in the Triply Post-main-sequence System DG Leo[J]. ASTROPHYSICAL JOURNAL,2025,994(2). |
| APA | 李平.,廖文萍.,Qian, Sheng-Bang.,朱俐颖.,张嘉.,...&孟芳斌.(2025).Asteroseismology and Dynamics Reveal Interior Structure and Coeval Evolution in the Triply Post-main-sequence System DG Leo.ASTROPHYSICAL JOURNAL,994(2). |
| MLA | 李平,et al."Asteroseismology and Dynamics Reveal Interior Structure and Coeval Evolution in the Triply Post-main-sequence System DG Leo".ASTROPHYSICAL JOURNAL 994.2(2025). |
入库方式： OAI收割
来源：云南天文台
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