| Pulsations and Period Changes of the SX Phoenicis Star DY Pegasi | |
Fu, JN1; Zha, Q1; Zhang, YP1; Chen, L1 ; Poon, H1; Marak, K2; Boonyarak, C2; Khokhuntod, P2; Su J(苏杰)3; Li Y(李焱)3; Zhang, C4; Jiang, SY5; Fu, JN (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.
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| 发表期刊 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
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| 2009-03 | |
| 卷号 | 121期号:877页码:251-259 |
| DOI | 10.1086/597829 |
| 产权排序 | 第3完成单位 |
| 收录类别 | SCI |
| 摘要 | We present 83 new times of maximum light of the SX Phoenicis (SX Phe) star DY Pegasi (DY Peg), based mainly on our new time-series photometric observations from the years 2004-2008. Together with the times of maximum light in the literature, a comprehensive study of the O - C diagram with the data spanning over seven decades leads to a new general ephemeris formula and the determination of a new value of the updated period 0.072926187(+/- 3)d. The available times of maximum light can be well modeled with either a triple linear fit, or a fit concerning a continuously increasing period change combined with the light-time effect of an orbital motion. On the contrary, the decreasing period hypothesis suggested by some previous investigators appears to be rejected. The frequency analyses of the data collected in 2004 and 2006 provide the radial pulsation frequency 13.713 c d(-1) and its four harmonics. However, although extra powers were present around the reported secondary frequency 17.8 c d(-1) in the Fourier transformations of the new data sets, its signal-to-noise ratios were too low to detect this frequency. |
| 项目资助者 | National Natural Science Foundation of China (NSFC) [10673001, 10778601, 10878007] ; New Century Excellent Talents in University (NCET) ; Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-6280 |
| URL | 查看原文 |
| WOS记录号 | WOS:000264812700005 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | DELTA-SCUTI STARS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5199 |
| 专题 | 恒星物理研究组 |
| 通讯作者 | Fu, JN (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China. |
| 作者单位 | 1.Department of Astronomy, Beijing Normal University, Beijing 100875, China 2.Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand 3.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China 4.Chinese National Geography, Chinese Academy of Sciences, Beijing 100101, China 5.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China |
| 推荐引用方式 GB/T 7714 | Fu, JN,Zha, Q,Zhang, YP,et al. Pulsations and Period Changes of the SX Phoenicis Star DY Pegasi[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2009,121(877):251-259. |
| APA | Fu, JN.,Zha, Q.,Zhang, YP.,Chen, L.,Poon, H.,...&Fu, JN .(2009).Pulsations and Period Changes of the SX Phoenicis Star DY Pegasi.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,121(877),251-259. |
| MLA | Fu, JN,et al."Pulsations and Period Changes of the SX Phoenicis Star DY Pegasi".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 121.877(2009):251-259. |
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