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EXPLORING THE HELIUM CORE OF THE delta SCUTI STAR COROT 102749568 WITH ASTEROSEISMOLOGY
Chen XH(陈兴浩)1,2,3; Li Y(李焱)1,2,3,4; Lin GF(林桂芳)1,2; Chen, Yanhui2,5,6; Guo JJ(郭军军)1,2,3; Chen, Xinghao(Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-01-10
卷号834期号:2页码:146-
DOI10.3847/1538-4357/834/2/146
产权排序第1完成单位
收录类别SCI
关键词Stars: Individual (Corot 102749568) Stars: Rotation Stars: Variables: Delta Scuti
摘要Based on regularities in rotational splitting, we seek possible multiplets for the observed frequencies of CoRoT 102749568. There are 21 sets of multiplets identified, including four sets of multiplets with l = 1, nine sets of multiplets with l = 2, and eight sets of multiplets with l = 3. In particular, there are three complete triplets (f(10), f(12), f(14)), (f(31), f(34), f(35)), and (f(41), f(43), f(44)). The rotational period of CoRoT 102749568 is estimated to be 1.34(-0.05)(+0.04) days. When doing model fittings, three l = 1 modes (f(12,) f(34), and f(43)) and the radial first overtone f(13) are used. Our results shows that the three nonradial modes (f(12), f(34), and f(43)) are mixed modes, which mainly provide constraints on the helium core. The radial first overtone f(13) mainly provides constraint on the stellar envelope. Hence the size of the helium core of CoRoT 102749568 is determined to be M-Pi e = 0.148 +/- 0.003 M-circle dot and R-Pi e = 0.0581 +/- 0.0007 R-circle dot. The fundamental parameters of CoRoT 102749568 are determined to be M = 1.54 +/- 0.03 M-circle dot, Z=0.006, f(ov) = 0.004 +/- 0.002, log g = 3.696 +/- 0.003, T-eff = 6886 +/- 70 K, R = 2.916 +/- 0.039 R-circle dot, and L = 17.12 +/- 1.13 L-circle dot.
项目资助者NSFC of China(11333006, 11521303, 11503079, 11563001) ; foundation of 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2017-01-17
WOS记录号WOS:000393759200008
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]STELLAR ASTROPHYSICS MESA ; WHITE-DWARFS ; OSCILLATIONS ; EVOLUTION ; ROTATION ; MODELS ; CONVECTION ; PHOTOMETRY ; OVERSHOOT ; SPECTROSCOPY
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9923
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, Xinghao(Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, 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
5.Institute of Astrophysics, Chuxiong Normal University, Chuxiong 675000, China
6.School of Physics and Electronical Science, Chuxiong Normal University, Chuxiong 675000, China
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Chen XH,Li Y,Lin GF,et al. EXPLORING THE HELIUM CORE OF THE delta SCUTI STAR COROT 102749568 WITH ASTEROSEISMOLOGY[J]. ASTROPHYSICAL JOURNAL,2017,834(2):146-.
APA Chen XH,Li Y,Lin GF,Chen, Yanhui,Guo JJ,&Chen, Xinghao.(2017).EXPLORING THE HELIUM CORE OF THE delta SCUTI STAR COROT 102749568 WITH ASTEROSEISMOLOGY.ASTROPHYSICAL JOURNAL,834(2),146-.
MLA Chen XH,et al."EXPLORING THE HELIUM CORE OF THE delta SCUTI STAR COROT 102749568 WITH ASTEROSEISMOLOGY".ASTROPHYSICAL JOURNAL 834.2(2017):146-.
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