Absolute Properties of Two Double-lined Algol-type Binaries with Cyclic Period Changes
文献类型：期刊论文
| 作者 | Zhang, Bin1,4; Gao, Yi-Dan1; Li, Chun-Qian2,3; Zhang J(张嘉)5; Zhao, Gang4; Xiao, Wen-Jun1; Zhao, Jing-Kun4; Chen XH(陈兴浩)5; Zhang, Xu-Dong.1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2026-02-10 |
| 卷号 | 998期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae2ea9 |
| 产权排序 | 第5完成单位 |
| 文献子类 | Article |
| 英文摘要 | The formation, evolution, and stability of multiple star systems are still open questions in the field of astrophysics. Algol-type binaries are important for obtaining precise physical parameters, investigating the reversal of the mass ratio, and studying the multiplicity of stars. We present a detailed analysis of RW Leo and RT Per with the high-precision time-series radial velocities from the LAMOST-medium-resolution spectroscopic survey and TESS light curves, and we first obtained their absolute parameters. We found that RT Per and RW Leo are post-mass transfer SD2-type semidetached binaries with mass ratios of 0.29 and 0.176, respectively, and the evolved secondary components almost fill their Roche lobe (both similar to 99.4%). Moreover, their O - C diagrams show double-cycle oscillations, and the oscillation periods are similar to 78 yr and similar to 41 yr for RW Leo and similar to 247 yr and similar to 41 yr for RT Per, respectively. The long-period of them may be caused by the presence of a third body with a mass not less than 0.4M circle dot, but we did not detect the third light. For RT Per, our fitting data do not fully cover a complete long-period oscillation (similar to 247 yr), and longer duration observations are needed to check our results in the future. For the 41 yr oscillations of RW Leo and RT Per, the cyclic magnetic activity from their active secondary components is a probable reason. Besides, after 2451218.604 (HJD), we also discovered that the magnetic activity cycle of RT Per suddenly halved to 20.88 yr because of a possible change in the geometry of the secondary's magnetic field. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | ANGULAR-MOMENTUM LOSS ; LOW-MASS STARS ; ECLIPSING BINARY ; ORBITAL-PERIOD ; CONTACT BINARIES ; SPECTROSCOPIC CANDIDATES ; STELLAR EVOLUTION ; MAGNETIC ACTIVITY ; CLOSE BINARIES ; LIGHT CURVES |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)[12588202] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001677502900001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Natural Science Foundation of China (NSFC)[12588202] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28894]  |
| 专题 | 云南天文台_恒星物理研究组 |
| 通讯作者 | Zhang, Bin |
| 作者单位 | 1.School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, People’s Republic of China; zhangbin@gznu.edu.cn; 2.Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, People’s Republic of China; 3.School of Physics and Astronomy, Beijing Normal University, Beijing 100875, People’s Republic of China; 4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; gzhao@bao.ac.cn; 5.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Zhang, Bin,Gao, Yi-Dan,Li, Chun-Qian,et al. Absolute Properties of Two Double-lined Algol-type Binaries with Cyclic Period Changes[J]. ASTROPHYSICAL JOURNAL,2026,998(1). |
| APA | Zhang, Bin.,Gao, Yi-Dan.,Li, Chun-Qian.,张嘉.,Zhao, Gang.,...&Zhang, Xu-Dong..(2026).Absolute Properties of Two Double-lined Algol-type Binaries with Cyclic Period Changes.ASTROPHYSICAL JOURNAL,998(1). |
| MLA | Zhang, Bin,et al."Absolute Properties of Two Double-lined Algol-type Binaries with Cyclic Period Changes".ASTROPHYSICAL JOURNAL 998.1(2026). |
入库方式： OAI收割
来源：云南天文台
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