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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
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2016-02-10
Volume818Issue:1
DOI10.3847/2041-8205/818/1/L13
Contribution Rank第1完成单位
Indexed BySCI
KeywordAsteroseismology Stars: Evolution Stars: Fundamental Parameters Stars: Individual: (Kic 6225718) Stars: Oscillations Stars: Solar-type
Abstract

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.

Funding ProjectNSFC of China[11333006] ; NSFC of China[11503076] ; NSFC of China[11521303] ; Chinese Academy of Sciences[XDB09010202] ; NASA's Science Mission ; Yunnan Observatories
Funding OrganizationNSFC of China[11333006, 11503076, 11521303] ; Chinese Academy of Sciences[XDB09010202] ; NASA's Science Mission ; Yunnan Observatories
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS IDWOS:000369605600013
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGENEVA-COPENHAGEN SURVEY ; STELLAR ASTROPHYSICS MESA ; GIANT BRANCH STARS ; NGC 6819 ; SOLAR NEIGHBORHOOD ; SEISMIC CONSTRAINTS ; OPEN CLUSTERS ; RED GIANTS ; G-DWARF ; KEPLER
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9334
Collection恒星物理研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorWu T(吴涛); Li Y(李焱)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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).
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