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AE Ursae Majoris - a delta Scuti star in the Hertzsprung Gap
Niu, Jia-Shu1,2,3; Fu, Jian-Ning1; Li Y(李焱)4; Yang, Xiao-Hu1,5; Zong, Weikai1,6,7; Xue, Hui-Fang1; Zhang, Yan-Ping1; Liu, Nian1; Du, Bing5; Zuo, Fang5
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2017-06-01
Volume467Issue:3Pages:3122-3139
DOI10.1093/mnras/stx125
Contribution Rank第4完成单位
Indexed BySCI
Keywordtechniques: photometric techniques: spectroscopic stars: individual: AE UMa stars: oscillations stars: variables: delta Scuti
Abstract

We analyse the photometric data and spectroscopic data collected on the d Scuti star AE Ursae Majoris ( AE UMa). The fundamental and the first overtone frequencies are confirmed as f(0) = 11.625 60 c d(-1) and f(1) = 15.031 24 c d(-1), respectively, from the frequency content by analysing light curves over 40 nights, spanning from 2009 to 2012. Additionally, another 37 frequencies are identified as either the harmonics or the linear combinations of the fundamental and the first overtone frequencies, among which 25 are newly detected. The rate of period change of the fundamental mode is determined as (1/P-0)(dP(0)/dt) = 5.4(+/- 1.9) x 10(-9) yr(-1) as revealed from the O - C diagram based on the 84 newly determined times of maximum light combined with those derived from the literature. The spectroscopic data suggest that AEUMa is a Population I d Scuti star. With these physical properties, we perform theoretical explorations based on the stellar evolution codeMESA on this target, considering that the variation of pulsation period is caused by secular evolutionary effects. We finally constrain AE UMa with physical parameters as follows: mass of 1.805 +/- 0.055M(circle dot), radius of 1.647 +/- 0.032 x 10(11) cm, luminosity of 1.381 +/- 0.048(log L/L-circle dot) and age of 1.055 +/- 0.095 x 10(9) yr. AE UMa can be the (Population I) d Scuti star that locates just after the second turn-off of its evolutional track leaving the main sequence, a star in the phase of the Hertzsprung Gap with a helium core and a hydrogen-burning shell.

Funding ProjectJoint Fund of Astronomy of National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences[U1231202] ; NSFC[11673003] ; National Basic Research Program of China (973 Program)[2014CB845700] ; National Basic Research Program of China (973 Program)[2013CB834900] ; Chinese Academy of Sciences
Funding OrganizationJoint Fund of Astronomy of National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences[U1231202] ; NSFC[11673003] ; National Basic Research Program of China (973 Program)[2014CB845700, 2013CB834900] ; Chinese Academy of Sciences
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
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000398419400048
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSERIES ENSEMBLE PHOTOMETRY ; STELLAR ASTROPHYSICS MESA ; SX PHOENICIS STARS ; EQUATION-OF-STATE ; PERIOD CHANGES ; BL CAMELOPARDALIS ; MASS STARS ; PULSATION ; OPACITIES ; ASTEROSEISMOLOGY
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10017
Collection恒星物理研究组
Corresponding AuthorFu, Jian-Ning
Affiliation1.Astronomy Department, Beijing Normal University, Beijing 100875, P.R. China
2.CAS Key Laboratory of Theoretical Physics and Kavli Institute for Theoretical Physics China (KITPC), Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, P.R. China
3.School of Physical Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, P.R. China
4.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, Kunming 650011, P.R. China
5.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P.R. China
6.Universit´e de Toulouse, UPS-OMP, IRAP, Toulouse F-31400, France
7.CNRS, IRAP, 14 avenue Edouard Belin, F-31400 Toulouse, France
Recommended Citation
GB/T 7714
Niu, Jia-Shu,Fu, Jian-Ning,Li Y,et al. AE Ursae Majoris - a delta Scuti star in the Hertzsprung Gap[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,467(3):3122-3139.
APA Niu, Jia-Shu.,Fu, Jian-Ning.,Li Y.,Yang, Xiao-Hu.,Zong, Weikai.,...&Zuo, Fang.(2017).AE Ursae Majoris - a delta Scuti star in the Hertzsprung Gap.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,467(3),3122-3139.
MLA Niu, Jia-Shu,et al."AE Ursae Majoris - a delta Scuti star in the Hertzsprung Gap".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 467.3(2017):3122-3139.
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