Extremely low mass ratio contact binaries - II. The first photometric and spectroscopic investigations of six systems with orbital periods longer than 0.5 d
文献类型：期刊论文
| 作者 | Liu, Fei3; Li, Kai3; Gao, Xiang3; Wang, Jing-Yi3; Xu, Xin3; Wang, Yi-Fan3; Wu, Cheng-Yu3; Li, Mu-Zi-Mei3; Gao, Xing2; Sun, Guo-You1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2025-06-01 |
| 卷号 | 540期号:1页码:1290-1307 |
| 关键词 | binaries: eclipsing stars: evolution stars: individual |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/staf763 |
| 产权排序 | 2 |
| 英文摘要 | The photometric and spectroscopic studies of six contact binaries were performed for the first time. The orbital periods of all the six targets are longer than 0.5 d, and we discovered that their mass ratios are smaller than 0.15. So, they are extremely low mass-ratio contact binaries. Only one target is a W-subtype contact binary (ASASSN-V J105032.88+420829.0), while the others are A-subtype contact binaries. From orbital period analysis, ASASSN-V J075442.44+555623.2 shows no orbital period change. Three of the six targets demonstrate a secular period increase and two targets for a secular period decrease. We investigated the LAMOST spectra employing the spectral subtraction method. All six contact binaries show no chromospheric emission line, implying no chromospheric activity. Their absolute parameters, initial masses, ages, energy transfer parameters, and instability parameters were calculated. The bolometric luminosity ratios ((L-2/L-1)(bol)), the energy transfer parameters (beta), the contact degrees (f), and the mass ratios (q) were collected for a sample of 218 contact binaries and we analysed and discussed some correlations. The results by analysing the relation between beta, f, and q indicate that the energy transfer parameter between the two components of extremely low mass-ratio contact binaries is independent of the contact degree. And the predicted cut-off mass ratio was estimated as 0.021 by analysing the relation between f and q. |
| WOS关键词 | COLOR LIGHT CURVES ; RADIAL-VELOCITY CURVES ; URSAE MAJORIS BINARY ; W UMA STARS ; PHYSICAL PARAMETERS ; ECLIPSING BINARIES ; CLOSE BINARIES ; SPECTRAL OBSERVATIONS ; ABSOLUTE ELEMENTS ; CCD PHOTOMETRY |
| 资助项目 | National Natural Science Foundation of China (NSFC)[12273018] ; Joint Research Fund in Astronomy[U1931103] ; Young Data Scientist Project of the National Astronomical Data Center ; Qilu Young Researcher Project of Shandong University ; Youth Student Fundamental Research Funds of Shandong University[SDUQM2420] ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Chinese Academy of Science Interdisciplinary Innovation Team ; National Astronomical Observatories, Chinese Academy of Sciences ; Guoshoujing Telescope ; National Development and Reform Commission ; NASA Science Mission Directorate ; Gordon and Betty Moore Foundation[GBMF5490] ; Gordon and Betty Moore Foundation[GBMF10501] ; Alfred P. Sloan Foundation[G-2021-14192] ; National Aeronautics and Space Administration ; National Science Foundation ; Ministry of Education, Youth and Sports of the Czech Republic[LM2018140] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001498776800001 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; Joint Research Fund in Astronomy ; Young Data Scientist Project of the National Astronomical Data Center ; Qilu Young Researcher Project of Shandong University ; Youth Student Fundamental Research Funds of Shandong University ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Chinese Academy of Science Interdisciplinary Innovation Team ; National Astronomical Observatories, Chinese Academy of Sciences ; Guoshoujing Telescope ; National Development and Reform Commission ; NASA Science Mission Directorate ; Gordon and Betty Moore Foundation ; Alfred P. Sloan Foundation ; National Aeronautics and Space Administration ; National Science Foundation ; Ministry of Education, Youth and Sports of the Czech Republic |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7777]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Li, Kai |
| 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 & Phys, Shandong Key Lab Opt Astron & Solar Terr Environm, Weihai 264209, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Fei,Li, Kai,Gao, Xiang,et al. Extremely low mass ratio contact binaries - II. The first photometric and spectroscopic investigations of six systems with orbital periods longer than 0.5 d[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2025,540(1):1290-1307. |
| APA | Liu, Fei.,Li, Kai.,Gao, Xiang.,Wang, Jing-Yi.,Xu, Xin.,...&Sun, Guo-You.(2025).Extremely low mass ratio contact binaries - II. The first photometric and spectroscopic investigations of six systems with orbital periods longer than 0.5 d.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,540(1),1290-1307. |
| MLA | Liu, Fei,et al."Extremely low mass ratio contact binaries - II. The first photometric and spectroscopic investigations of six systems with orbital periods longer than 0.5 d".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 540.1(2025):1290-1307. |
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