Photometric and spectroscopic studies of four low mass-ratio contact binaries with period longer than 0.7 d
文献类型：期刊论文
| 作者 | Wang, Yi-Fan3; Li, Kai3; Liu, Fei3; Xu, Xin3; Li, Mu-Zi-Mei3; Wu, Cheng-Yu3; Li, Yu-Tong4; Tang, Yan-Ke4; Gao, Xing2; Sun, Guo-You1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 544期号:2页码:1958-1980 |
| 关键词 | binaries (including multiple): close binaries: eclipsing stars: evolution stars: individual |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/staf1844 |
| 产权排序 | 3 |
| 英文摘要 | Photometric and spectroscopic studies of four long-period low mass-ratio contact binaries, V0508 And, V0844 Aur, V0699 Cep, and NSVS 6259046, are performed. V0508 And, V0844 Aur, and V0699 Cep are found to be A-type low-mass-ratio medium-contact binaries, while NSVS 6259046 is found to be an A-type deep-contact binary. $O - C$ analysis indicates no long-term variation in V0844 Aur. However, the orbital periods of the other three targets are increasing. We conclude that V0844 Aur, V0699 Cep, and NSVS 6259046 are magnetically active, as evidenced by the presence and variable nature of the O'Connell effect in these systems. By analysing the LAMOST spectroscopic data, we find out that NSVS 6259046 and V0508 And exhibit no chromospheric activity on the dates the LAMOST spectra were taken, while the low signal-to-noise ratio in LAMOST data for V0844 Aur prevents us from obtaining reliable results. We discover that V0699 Cep is an early-type contact binary with chromospheric activity. Their initial masses and ages are calculated. All four systems are determined to be currently stable. We collect 217 contact binaries with both spectroscopic and photometric observations, and compare the differences between short-period and long-period systems in terms of mass-luminosity relation and mass-radius relation, using 0.7 d as the period boundary. |
| WOS关键词 | COLOR LIGHT CURVES ; W UMA STARS ; URSAE MAJORIS BINARY ; PHYSICAL PARAMETERS ; RADIAL-VELOCITY ; ECLIPSING BINARIES ; GEOMETRIC PARAMETERS ; OVERCONTACT BINARIES ; ORBITAL PERIOD ; ABSOLUTE PARAMETERS |
| 资助项目 | Chinese Academy of Sciences ; CAS ; National Natural Science Foundation of China[12273018] ; National Natural Science Foundation of China[12573033] ; National Natural Science Foundation of China[U1931103] ; National Natural Science Foundation of China[ZR2021QA079] ; National Natural Science Foundation of China[ZR2025MS81] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001615617200001 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | Chinese Academy of Sciences ; CAS ; National Natural Science Foundation of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8308]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Li, Kai; Li, Yu-Tong |
| 作者单位 | 1.Xingming Observ, Urumqi 830002, Xinjiang, Peoples R China 2.Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China 3.Shandong Univ, Inst Space Sci, Sch Space Sci & Technol, Shandong Key Lab Space Environm & Explorat Technol, Weihai 264209, Shandong, Peoples R China 4.Dezhou Univ, Coll Phys & Elect informat, Shandong Key Lab Space Environm & Explorat Technol, 566 West Univ Rd, Dezhou 253023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yi-Fan,Li, Kai,Liu, Fei,et al. Photometric and spectroscopic studies of four low mass-ratio contact binaries with period longer than 0.7 d[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2025,544(2):1958-1980. |
| APA | Wang, Yi-Fan.,Li, Kai.,Liu, Fei.,Xu, Xin.,Li, Mu-Zi-Mei.,...&Sun, Guo-You.(2025).Photometric and spectroscopic studies of four low mass-ratio contact binaries with period longer than 0.7 d.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,544(2),1958-1980. |
| MLA | Wang, Yi-Fan,et al."Photometric and spectroscopic studies of four low mass-ratio contact binaries with period longer than 0.7 d".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 544.2(2025):1958-1980. |
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来源：新疆天文台
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