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Determining the Evolutionary Stage of the delta Scuti Star HIP 80088 with Asteroseismology
Chen XH(陈兴浩)1,2; Li Y(李焱)1,2,3,4
发表期刊ASTROPHYSICAL JOURNAL
2018-10-20
卷号866期号:2页码:7
DOI10.3847/1538-4357/aadfdc
产权排序第1完成单位
收录类别SCI
关键词asteroseismology stars: individual (HIP 80088) stars: rotation stars: variables: delta Scuti
摘要

We have computed a grid of theoretical models to fit the 12 oscillation modes of HIP 80088 observed by K2. HIP 80088 is determined to be a pre-main-sequence star, in which the CN cycle has not arrived at the equilibrium state. Mass fractions of C12 and N14 in metal composition are 0.1277(-0.0049)(+0.0064) and 0.1092(-0.0074)(+0.0057), respectively, indicating that 28% of C12 have turned into N14. Meanwhile, our fitting results show that physical parameters of HIP 80088 converge to a small range: M = 1.68-1.78 M-circle dot, Z = 0.015-0.018, v(e) = 120-136 km s(-1), log g = 4.114-4.125, R = 1.882-1.914 R-circle dot, tau(0)= 7636-7723 s, and age = 9.03-10.21 Myr. Based on our model fittings, f(3) is suggested to be one radial mode, f(2), f(4), f(8), and f(11) to be four l = 1 modes, and f(1), f(5), f(6) , f(7), f(9), f(10), and f(12) to be seven l = 2 modes. In particular, we find that (f(2), f(4), f(8)) form one complete triplet with the averaged frequency spacing of 16.045 mu Hz, and (f(5), f(7), f(9), f(10)) form four components of one quintuplet with the averaged frequency spacing of 13.388 mu Hz. The two averaged frequency spacings are not equal. Based on the best-fitting model, those l = 2 modes of HIP 80088 are found to be mixed modes, which are p-dominated modes with pronounced g-mode features, while oscillation modes with l = 1 are p modes.

资助项目NSFC of China[11333006] ; NSFC of China[11521303] ; NSFC of China[11803082] ; foundation of Light of West China Program from Chinese Academy of Sciences
项目资助者NSFC of China[11333006, 11521303, 11803082] ; foundation of Light of West China Program from Chinese Academy of Sciences
语种英语
学科领域天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS记录号WOS:000448201700012
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]PRE-MAIN-SEQUENCE ; OPACITIES
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被引频次:1[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/114a53/18017
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
通讯作者Chen XH(陈兴浩); Li Y(李焱)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China
2.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China
3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China
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Chen XH,Li Y. Determining the Evolutionary Stage of the delta Scuti Star HIP 80088 with Asteroseismology[J]. ASTROPHYSICAL JOURNAL,2018,866(2):7.
APA Chen XH,&Li Y.(2018).Determining the Evolutionary Stage of the delta Scuti Star HIP 80088 with Asteroseismology.ASTROPHYSICAL JOURNAL,866(2),7.
MLA Chen XH,et al."Determining the Evolutionary Stage of the delta Scuti Star HIP 80088 with Asteroseismology".ASTROPHYSICAL JOURNAL 866.2(2018):7.
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