The study of 11 contact binaries with mass ratios less than 0.1
文献类型：期刊论文
| 作者 | Liu, Xin-Yi4; Li, Kai4; Michel, Raul3; Gao, Xiang4; Gao, Xing2; Liu, Fei4; Yin, Shi-Peng4; Wang, Xi; Sun4 |
| 刊名 | Monthly Notices of the Royal Astronomical Society
 |
| 出版日期 | 2023-03-01 |
| 卷号 | 519期号:4页码:5760-5774 |
| 关键词 | binaries: close binaries: eclipsing stars: evolution stars: individual eclipsing binaries stellar mergers star light systems evolution parameters telescope stability velocity catalog Astronomy & Astrophysics |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stad026 |
| 产权排序 | 3 |
| 文献子类 | Article |
| 英文摘要 | Multi-band photometric observations of 11 totally eclipsing contact binaries were carried out. Applying the Wilson-Devinney program, photometric solutions were obtained. There are two W-subtype systems, which are CRTS J133031.1+161202 and CRTS J154254.0+324652, and the rest of the systems are A-subtype systems. CRTS J154254.0 + 324652 has the highest fill-out factor with 94.3 per cent, and the lowest object is CRTS J155009.2 + 493639 with only 18.9 per cent. The mass ratios of the 11 systems are all less than 0.1, which means that they are extremely low-mass ratio binary systems. We performed period variation investigation and found that the orbital periods of three systems decrease slowly, which may be caused by the angular momentum loss, and those of six systems increase slowly, which indicates that the materials may transfer from the secondary component to the primary component. LAMOST low-resolution spectra of four objects were analysed, and using the spectral subtraction technique, H alpha emission line was detected, which means that the four objects exhibit chromospheric activity. In order to understand their evolutionary status, the mass-luminosity and mass-radius diagrams were plotted. The two diagrams indicate that the primary component is in the main sequence evolution stage, and the secondary component is above TAMS, indicating that they are over-luminous. To determine whether the 11 systems are in a stable state, the ratio of spin angular momentum to orbital angular momentum (J(s)/J(o)) and the instability parameters were calculated, and we argued that CRTS J234634.7 + 222824 is on the verge of a merger. |
| 语种 | 英语 |
| WOS记录号 | WOS:000927913700009 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6644]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Li, Kai |
| 作者单位 | 1.Wenzhou Astronomical Association, Beibaixiang Town, Yueqing, Zhejiang, 325603, China 2.Xinjiang Astronomical Observatory, 150 Science 1-Street, Urumqi 830011, China; 3.Observatorio Astron ´omico Nacional, Instituto de Astronom ´ıa, Universidad Nacional Aut ´onoma de M ´exico, Apartado Postal 877, Ensenada, B.C. 22830, M ´exico; 4.Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai, Shandong 264209, China; |
| 推荐引用方式 GB/T 7714 | Liu, Xin-Yi,Li, Kai,Michel, Raul,et al. The study of 11 contact binaries with mass ratios less than 0.1[J]. Monthly Notices of the Royal Astronomical Society,2023,519(4):5760-5774. |
| APA | Liu, Xin-Yi.,Li, Kai.,Michel, Raul.,Gao, Xiang.,Gao, Xing.,...&Sun.(2023).The study of 11 contact binaries with mass ratios less than 0.1.Monthly Notices of the Royal Astronomical Society,519(4),5760-5774. |
| MLA | Liu, Xin-Yi,et al."The study of 11 contact binaries with mass ratios less than 0.1".Monthly Notices of the Royal Astronomical Society 519.4(2023):5760-5774. |
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