NEW INSIGHTS FOR HIGH-PRECISION ASTEROSEISMOLOGY: ACOUSTIC RADIUS OF KIC 6225718
文献类型：期刊论文
| 作者 | Wu T(吴涛)1,2 ; Li Y(李焱)1,2
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2016-02-10 |
| 卷号 | 818期号:1 |
| 关键词 | asteroseismology stars: evolution stars: fundamental parameters stars: individual: (KIC 6225718) stars: oscillations stars: solar-type |
| ISSN号 | 2041-8205 |
| 产权排序 | 第一完成单位 |
| 英文摘要 | Asteroseismology is a powerful tool for probing stellar interiors and determining stellar fundamental parameters. In previous works, the chi(2)- minimization method is usually used to find the best-matching model to characterize observations. In this Letter, we adopt the chi(2)- minimization method but only use the observed high-precision oscillation to constrain theoretical models for solar-like oscillating star KIC 6225718, which is observed by the Kepler satellite. We also take into account the influence of model precision. Finally, we find that the time resolution of stellar evolution cannot be ignored in high-precision asteroseismic analysis. Based on this, we find the acoustic radius tau(0) is the only global parameter that can be accurately measured by the chi(2)(nu)-matching method between observed frequencies and theoretical model calculations. We obtain tau(0) = 4601.5(-8.3)(+4.4) s. Inaddition,we analyze the distribution of chi(2)(nu)-minimization models (CMMs) and find that the distribution range of CMMs is slightly enlarged by some extreme cases, which possess both a larger mass and a higher (or lower) heavy element abundance, at the lower acoustic radius end. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GENEVA-COPENHAGEN SURVEY ; STELLAR ASTROPHYSICS MESA ; GIANT BRANCH STARS ; NGC 6819 ; SOLAR NEIGHBORHOOD ; SEISMIC CONSTRAINTS ; OPEN CLUSTERS ; RED GIANTS ; G-DWARF ; KEPLER |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.3847/2041-8205/818/1/L13/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000369605600013 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9334]  |
| 专题 | 云南天文台_恒星物理研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China; 2.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Wu T,Li Y. NEW INSIGHTS FOR HIGH-PRECISION ASTEROSEISMOLOGY: ACOUSTIC RADIUS OF KIC 6225718[J]. ASTROPHYSICAL JOURNAL LETTERS,2016,818(1). |
| APA | Wu T,&Li Y.(2016).NEW INSIGHTS FOR HIGH-PRECISION ASTEROSEISMOLOGY: ACOUSTIC RADIUS OF KIC 6225718.ASTROPHYSICAL JOURNAL LETTERS,818(1). |
| MLA | Wu T,et al."NEW INSIGHTS FOR HIGH-PRECISION ASTEROSEISMOLOGY: ACOUSTIC RADIUS OF KIC 6225718".ASTROPHYSICAL JOURNAL LETTERS 818.1(2016). |
入库方式： OAI收割
来源：云南天文台
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