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NEW INSIGHTS FOR HIGH-PRECISION ASTEROSEISMOLOGY: ACOUSTIC RADIUS OF KIC 6225718
Wu T(吴涛)1,2; Li Y(李焱)1,2
发表期刊ASTROPHYSICAL JOURNAL LETTERS
2016-02-10
卷号818期号:1
DOI10.3847/2041-8205/818/1/L13
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收录类别SCI
关键词Asteroseismology Stars: Evolution Stars: Fundamental Parameters Stars: Individual: (Kic 6225718) Stars: Oscillations Stars: Solar-type
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.
项目资助者NSFC of China(11333006, 11503076, 11521303) ; Chinese Academy of Sciences(XDB09010202) ; NASA's Science Mission ; Yunnan Observatories
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN2041-8205
URL查看原文
WOS记录号WOS:000369605600013
WOS研究方向Astronomy & Astrophysics
WOS类目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
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9334
专题恒星物理研究组
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
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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).
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