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Asteroseismic Analysis of a Red Giant KIC 9145955 by Including the Small-scale Magnetic Fields in the Atmosphere

文献类型：期刊论文

作者Wang YT(王悦同)1,2,3; Lin GF(林桂芳)1,3; Li Y(李焱)1,2,3,4; Wu T(吴涛)1,3,4; Li, Yaguang5
刊名ASTROPHYSICAL JOURNAL
出版日期2025-05-20
卷号985期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/adc71a
产权排序第1完成单位
文献子类Article
英文摘要Recent convincing evidence is found within asteroseismology that suggests the magnetic fields exist in three red giants. Research on small-scale magnetic fields in the Sun and HD 49385 has shown that they have a certain corrective effect on the systematic discrepancies between observed and theoretical frequencies. Here we apply a similar method applied for the Sun to a red giant, KIC 9145955, to explore the impact of small-scale magnetic fields in the photosphere on its frequencies. We find that the calculated frequencies of our best-fit model, which simulates the effect of the magnetic fields by artificially modifying the Eddington T-tau relation, perfectly match those of the observed l = 0, 1, and 2 modes, indicating the existence of small-scale magnetic fields with an upper strength limit of 65 G and concentrating at a height 13,100 km in the photosphere. Based on the best-fit model, we revise the stellar parameters of KIC 9145955 as M = 1.23 +/- 0.04 M circle dot, R = 5.57 +/- 0.06 R circle dot, L = 19.85 +/- 0.5 L circle dot, Age = 3.83 +/- 0.5 Gyr, MHe = 0.2108 +/- 0.0005 M circle dot, and RHe = 0.0306 +/- 0.0001 R circle dot.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词STELLAR OSCILLATION FREQUENCIES ; SURFACE-EFFECT CORRECTIONS ; MASSIVE STAR EVOLUTION ; MODE EIGENFREQUENCIES ; CONVECTIVE BOUNDARIES ; NUMERICAL SIMULATIONS ; ACTIVE STARS ; SOLAR ; MODULES ; INTERNETWORK
资助项目National Natural Science Foundation of China[12273104]; National Key R&D Program of China[2021YFA1600400/2021YFA1600402]; International Center of Supernovae at the Yunnan Key Laboratory[202302AN360001]; Natural Science Foundation of Yunnan Province[202401CF070041]; B-type Strategic Priority Program of Chinese Academy of Sciences[XDB41000000]; Yunnan Fundamental Research Projects[202401AS070045]; Youth Innovation Promotion Association of Chinese Academy of Sciences, and Yunnan Ten Thousand Talents Plan Young & Elite Talents Project
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001493092200001
出版者IOP Publishing Ltd
资助机构National Natural Science Foundation of China[12273104] ; National Key R&D Program of China[2021YFA1600400/2021YFA1600402] ; International Center of Supernovae at the Yunnan Key Laboratory[202302AN360001] ; Natural Science Foundation of Yunnan Province[202401CF070041] ; B-type Strategic Priority Program of Chinese Academy of Sciences[XDB41000000] ; Yunnan Fundamental Research Projects[202401AS070045] ; Youth Innovation Promotion Association of Chinese Academy of Sciences, and Yunnan Ten Thousand Talents Plan Young & Elite Talents Project
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28318]  
专题云南天文台_恒星物理研究组
云南天文台_人教处
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; wangyuetong@ynao.ac.cn;
2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
3.International Center of Supernovae at the Yunnan Key Laboratory, Kunming 650216, People's Republic of China;
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China;
5.Institute for Astronomy, University of Hawai'i, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
推荐引用方式
GB/T 7714		 Wang YT,Lin GF,Li Y,et al. Asteroseismic Analysis of a Red Giant KIC 9145955 by Including the Small-scale Magnetic Fields in the Atmosphere[J]. ASTROPHYSICAL JOURNAL,2025,985(1).
APA 王悦同,林桂芳,李焱,吴涛,&Li, Yaguang.(2025).Asteroseismic Analysis of a Red Giant KIC 9145955 by Including the Small-scale Magnetic Fields in the Atmosphere.ASTROPHYSICAL JOURNAL,985(1).
MLA 王悦同,et al."Asteroseismic Analysis of a Red Giant KIC 9145955 by Including the Small-scale Magnetic Fields in the Atmosphere".ASTROPHYSICAL JOURNAL 985.1(2025).

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来源：云南天文台

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