AE Ursae Majoris - a delta Scuti star in the Hertzsprung Gap
文献类型：期刊论文
| 作者 | Yang, XH; Niu, JS; Fu, JN; Li, Y; Zong, WK; Xue, HF; Zhang, YP; Liu, N; Du, B; Zuo, F |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2017 |
| 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 |
| DOI | http://dx.doi.org/10.1093/mnras/stx125 |
| 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 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/22050]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Fu, JN (reprint author), Beijing Normal Univ, Astron Dept, Beijing 100875, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Yang, XH,Niu, JS,Fu, JN,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 | Yang, XH.,Niu, JS.,Fu, JN.,Li, Y.,Zong, WK.,...&Fu, JN .(2017).AE Ursae Majoris - a delta Scuti star in the Hertzsprung Gap.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,467(3),3122-3139. |
| MLA | Yang, XH,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. |
入库方式： OAI收割
来源：理论物理研究所
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