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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
Source PublicationASTROPHYSICAL JOURNAL
2017-03-20
Volume838Issue:1
DOI10.3847/1538-4357/aa6339
Contribution Rank第1完成单位
Indexed BySCI
KeywordAsteroseismology Stars: Individual (Ee Cam) Stars: Rotation Stars: Variables: Delta Scuti
Abstract

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.

Funding ProjectNSFC of China[11333006] ; NSFC of China[11521303] ; NSFC of China[11503079] ; Chinese Academy of Sciences[XDB09010202]
Funding OrganizationNSFC of China[11333006, 11521303, 11503079] ; 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 Date2017-03-22
WOS IDWOS:000398727400009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordStellar Astrophysics Mesa ; Hd 50844 ; Oscillations ; Photometry ; Metallicities ; Pulsation ; Telescope ; Wolfgang ; Amadeus ; Modules
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9984
Collection恒星物理研究组
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
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. Rotational Splitting and Asteroseismic Modeling of the delta Scuti Star EE Camelopardalis[J]. ASTROPHYSICAL JOURNAL,2017,838(1).
APA Chen XH,&Li Y.(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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