| Seismological analysis of the stars gamma Serpentis and iota Leonis: Stellar parameters and evolution | |
Bi SL(毕少兰)1,2 ; Basu, S3; Li, LH3; Bi, SL (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2008-02-01 | |
| 卷号 | 673期号:2页码:1093-1105 |
| DOI | 10.1086/521575 |
| 产权排序 | 第2完成单位 |
| 收录类别 | SCI |
| 关键词 | Stars : Evolution Stars : Fundamental Parameters Stars : Oscillations Stars : Individual (Gamma Serpentis = Hd 142860 Iota Leonis = Hd 99028) |
| 摘要 | In order to assess the information that will be available from targets of the Microvariability and Oscillations of Stars (MOST) satellite, we explore the possible evolutionary status and perform preliminary seismological analysis of two targets: the stars gamma Ser and iota Leo, which show solar-like oscillations. Taking into account the astrometric observational constraints on the stars, we find that gamma Ser is in the main-sequence phase of evolution, while iota Leo has two distinct solutions that match well with observations: main-sequence models and post-main-sequence models. The evolutionary tracks cover the following ranges of mass and initial metallicity: gamma Ser, 1.15-1.20 M-circle dot and Z = 0.0135 +/- 0.003; iota Leo, 1.62-1.70 M-circle dot and Z = 0.024 +/- 0.002 (for values of the Galactic helium enrichment ratio Delta Y/Delta Z in the range 0 - 2). By combining stellar models with observational constraints, we determine age ranges of 3.2 +/- 0.6 Gyr for gamma Ser and 1.7 +/- 0.2 Gyr for iota Leo. The results show that the masses and ages of the stars are very sensitive to metallicity and evolutionary phase. Furthermore, we find that models with overshooting from a convective core predict a larger age for a given mass. Finally, we discuss future prospects for constraining stellar models with the help of asteroseismic observations. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-637X |
| URL | 查看原文 |
| WOS记录号 | WOS:000253454300039 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | MAIN-SEQUENCE STARS ; STANDARD SOLAR MODEL ; DEBRIS DISKS ; ETA-BOOTIS ; ABUNDANCES ; ASTEROSEISMOLOGY ; SPECTRA ; CLASSIFICATION ; OSCILLATIONS ; OPACITIES |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5196 |
| 专题 | 恒星物理研究组 |
| 通讯作者 | Bi, SL (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China. |
| 作者单位 | 1.Department of Astronomy, Beijing Normal University, 100875 Beijing, China 2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011 Yunnan, China 3.Department of Astronomy, Yale University, New Haven, CT 06520 |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Bi SL,Basu, S,Li, LH,et al. Seismological analysis of the stars gamma Serpentis and iota Leonis: Stellar parameters and evolution[J]. ASTROPHYSICAL JOURNAL,2008,673(2):1093-1105. |
| APA | Bi SL,Basu, S,Li, LH,&Bi, SL .(2008).Seismological analysis of the stars gamma Serpentis and iota Leonis: Stellar parameters and evolution.ASTROPHYSICAL JOURNAL,673(2),1093-1105. |
| MLA | Bi SL,et al."Seismological analysis of the stars gamma Serpentis and iota Leonis: Stellar parameters and evolution".ASTROPHYSICAL JOURNAL 673.2(2008):1093-1105. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Seismological Analys（607KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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