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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
Source PublicationASTROPHYSICAL JOURNAL
2017-01-10
Volume834Issue:2Pages:146-
DOI10.3847/1538-4357/834/2/146
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Individual (Corot 102749568) Stars: Rotation Stars: Variables: Delta Scuti
Abstract

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.

Funding ProjectNSFC of China[11333006] ; NSFC of China[11521303] ; NSFC of China[11503079] ; NSFC of China[11563001] ; foundation of Chinese Academy of Sciences[XDB09010202]
Funding OrganizationNSFC of China[11333006, 11521303, 11503079, 11563001] ; foundation of Chinese Academy of Sciences[XDB09010202]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
Archive Date2017-01-17
WOS IDWOS:000393759200008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSTELLAR ASTROPHYSICS MESA ; WHITE-DWARFS ; OSCILLATIONS ; EVOLUTION ; ROTATION ; MODELS ; CONVECTION ; PHOTOMETRY ; OVERSHOOT ; SPECTROSCOPY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9923
Collection恒星物理研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorChen XH(陈兴浩)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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.(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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