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 | |
刊名 | ASTROPHYSICAL JOURNAL |
2018-10-20 | |
卷号 | 866期号:2页码:7 |
关键词 | asteroseismology stars: individual (HIP 80088) stars: rotation stars: variables: delta Scuti |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/aadfdc |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | 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. |
学科主题 | 天文学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
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 |
WOS关键词 | PRE-MAIN-SEQUENCE ; OPACITIES |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000448201700012 |
资助机构 | NSFC of China[11333006, 11521303, 11803082] ; foundation of Light of West China Program from Chinese Academy of Sciences |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/18016] |
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 | 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 |
推荐引用方式 GB/T 7714 | 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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