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Rotational Splitting and Asteroseismic Modeling of the delta Scuti Star EE Camelopardalis
Chen XH(陈兴浩)1,2,3; Li Y(李焱)1,2,3,4; Chen, Xinghao(Chinese Acad Sci, Yunnan Observ, POB110, Kunming 650011, Yunnan, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-03-20
卷号838期号:1
DOI10.3847/1538-4357/aa6339
产权排序第1完成单位
收录类别SCI
关键词Asteroseismology Stars: Individual (Ee Cam) Stars: Rotation Stars: Variables: Delta Scuti
摘要According to the rotational splitting law of g modes, the frequency spectra of EE Cam can be disentangled only with oscillation modes of l. =. 0, 1, and 2. Fifteen sets of rotational splits were found, and they contain five sets of l =. 1 multiplets and 10 sets of l. =. 2 multiplets. The rotational period of EE Cam is deduced to be P-rot = 1.84(-0.05)(+0.07) days. When we do model fittings, we use two nonradial oscillation modes (f11 and f32), and the fundamental radial mode f1. The fitting results show that c2 of the best-fitting model is much smaller than those of other theoretical models. The physical parameters of the best-fitting model are M-circle dot =. 2.04 Me, Z. =. 0.028, T-eff. =. 6433 K, logL L. = 1.416, R. =. 4.12 Re, log g = 3.518, and c2 = 0.00035. Furthermore, we find that f(11) and f(32) are mixed modes, which mainly characterize the features of the helium core. The fundamental radial mode f(1) mainly restricts the features of the stellar envelope. Finally, the acoustic radius t0 and the period separation.0 are determined to be 5.80 hr and 463.7 s, respectively, and the size of the helium core of EE Cam is estimated to be M-He. =. 0.181 M-circle dot and R-He. =. 0.0796 R-circle dot.
项目资助者NSFC of China(11333006, 11521303, 11503079) ; Chinese Academy of Sciences(XDB09010202)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2017-03-22
WOS记录号WOS:000398727400009
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]STELLAR ASTROPHYSICS MESA ; HD 50844 ; OSCILLATIONS ; PHOTOMETRY ; METALLICITIES ; PULSATION ; TELESCOPE ; WOLFGANG ; AMADEUS ; MODULES
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9984
专题恒星物理研究组
通讯作者Chen, Xinghao(Chinese Acad Sci, Yunnan Observ, POB110, Kunming 650011, Yunnan, Peoples R China)
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
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China
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Chen XH,Li Y,Chen, Xinghao. Rotational Splitting and Asteroseismic Modeling of the delta Scuti Star EE Camelopardalis[J]. ASTROPHYSICAL JOURNAL,2017,838(1).
APA Chen XH,Li Y,&Chen, Xinghao.(2017).Rotational Splitting and Asteroseismic Modeling of the delta Scuti Star EE Camelopardalis.ASTROPHYSICAL JOURNAL,838(1).
MLA Chen XH,et al."Rotational Splitting and Asteroseismic Modeling of the delta Scuti Star EE Camelopardalis".ASTROPHYSICAL JOURNAL 838.1(2017).
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