Asteroseismology of 16 Kepler Solar-like Stars: Stellar Parameters and the Effects of Element Diffusion
文献类型:期刊论文
作者 | Wang S(王帅)2,3; Zhang QS(张钱生)1,2,3,4,5 |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS |
出版日期 | 2023-07-01 |
卷号 | 23期号:7 |
ISSN号 | 1674-4527 |
关键词 | asteroseismology diffusion stars: interiors stars: abundances |
DOI | 10.1088/1674-4527/acd58f |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Element diffusion has small but significant effects on the structure of the stellar interior. It is interesting to investigate the effects of element diffusion using asteroseismology. We have constructed two grids of stellar models, one with diffusion and one without, for solar-like stars with masses between 0.9 and 1.4 solar masses, and varied initial helium abundance and metallicity. The oscillation frequencies of all stellar models have also been calculated. Piecewise Hermite cubic polynomials are adopted to interpolate stellar p-mode frequencies at an arbitrary age on a stellar evolutionary track. We have investigated 16 Kepler solar-like stars by comparing the model frequencies with observations. The suggested ranges of stellar parameters and some global variables are obtained. For all stars, the best model reproduces the observational frequencies with a chi (2) of the order of unity. It has been found that element diffusion is important in modeling solar-like stars. Without diffusion, the best value of the initial helium abundance is below the primordial helium abundance from Big Bang nucleosynthesis. When diffusion is taken into account, the required initial helium abundance increases to be higher than the primordial abundance. Diffusion also generally improves the frequency fitting results by reducing the minimum of chi (2). Investigation of the second difference of the oscillation frequencies on KIC 8694723 and KIC 10454113 indicates that the current model of element diffusion may underestimate the strength of settling. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星物理学 |
URL标识 | 查看原文 |
出版地 | 20A DATUN RD, CHAOYANG, BEIJING, 100101, PEOPLES R CHINA |
WOS关键词 | F STARS ; OSCILLATION FREQUENCIES ; LITHIUM ABUNDANCE ; MODELS ; OVERSHOOT ; EVOLUTION ; ENVELOPE ; HYADES ; AGES ; CONSISTENT |
资助项目 | National Key R&D Program of China[2021YFA1600400/2021YFA1600402] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB 41000000] ; National Natural Science Foundation of China[1177064] ; National Natural Science Foundation of China[12133011] ; Foundation of the Chinese Academy of Sciences ; (Youth Innovation Promotion Association) ; Yunnan Ten Thousand Talents Plan Young and Elite Talents Project ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
WOS记录号 | WOS:001011483500001 |
资助机构 | National Key R&D Program of China[2021YFA1600400/2021YFA1600402] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB 41000000] ; National Natural Science Foundation of China[1177064, 12133011] ; Foundation of the Chinese Academy of Sciences ; (Youth Innovation Promotion Association) ; Yunnan Ten Thousand Talents Plan Young and Elite Talents Project ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26083] |
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 |
通讯作者 | Wang S(王帅) |
作者单位 | 1.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100101, China; 2.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, China; wangshuai@ynao.ac.cn, zqs@ynao.ac.cn; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China; 5.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China |
推荐引用方式 GB/T 7714 | Wang S,Zhang QS. Asteroseismology of 16 Kepler Solar-like Stars: Stellar Parameters and the Effects of Element Diffusion[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2023,23(7). |
APA | Wang S,&Zhang QS.(2023).Asteroseismology of 16 Kepler Solar-like Stars: Stellar Parameters and the Effects of Element Diffusion.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,23(7). |
MLA | Wang S,et al."Asteroseismology of 16 Kepler Solar-like Stars: Stellar Parameters and the Effects of Element Diffusion".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 23.7(2023). |
入库方式: OAI收割
来源:云南天文台
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