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 | |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
2017-06-01 | |
卷号 | 467期号:3页码:3122-3139 |
关键词 | techniques: photometric techniques: spectroscopic stars: individual: AE UMa stars: oscillations stars: variables: delta Scuti |
ISSN号 | 0035-8711 |
通讯作者 | Fu, Jian-Ning(Beijing Normal Univ, Astron Dept, Beijing 100875, Peoples R China) |
产权排序 | 第4完成单位 |
英文摘要 | 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. |
学科主题 | 天文学 |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | SERIES ENSEMBLE PHOTOMETRY ; STELLAR ASTROPHYSICS MESA ; SX PHOENICIS STARS ; EQUATION-OF-STATE ; PERIOD CHANGES ; BL CAMELOPARDALIS ; MASS STARS ; PULSATION ; OPACITIES ; ASTEROSEISMOLOGY |
收录类别 | SCI |
原文出处 | https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx125 |
语种 | 英语 |
WOS记录号 | WOS:000398419400048 |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/10017] |
专题 | 云南天文台_恒星物理研究组 |
作者单位 | 1.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 |
推荐引用方式 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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