W UMa-type Contact Binaries in the Tidal Tails of Young Open Clusters COIN-Gaia 25 and Mamajek 4
文献类型：期刊论文
| 作者 | Xiang B(项彬)1,2,3,4; Liu L(刘亮)1,2,3,4; Zhu LY(朱俐颖)1,2,3,4; Shi XD(施相东)1,2,3; Liu NP(刘念平)1,2,3 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2026-09-24 |
| 卷号 | 26期号:9 |
| 关键词 | (stars:) binaries (including multiple): close (stars:) binaries: eclipsing stars: kinematics and dynamics |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/ae616b |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Star clusters, as dynamically rich environments, are thought to be important sites for the formation of contact binaries. To investigate this, we conducted a systematic search for contact binaries within two young open clusters, COIN-Gaia 25 and Mamajek 4, and their associated tidal tails. From this search, we identified and confirmed two contact binary systems: ASASSN-V J064923.44+013758.4 in the tidal tail of COIN-Gaia 25, and ASASSN-V J173229.06-613712.5 in the tidal tail of Mamajek 4. Using TESS light curve data, we performed detailed modeling with a Markov Chain Monte Carlo method within the 2015 version of the Wilson-Devinney code. The resulting photometric parameters are: q(ph) = 0.316 +/- 0.013, i=76.9(-0.9)(+1.3) degrees, f=23.1(-1.9)(+1.4) % for ASASSN-V J064923.44+013758.4, and q(ph) = 0.130 +/- 0.004, i=68.4(-1.3)(+1.4) degrees, f=66.3(-5.3)(+5.0) % for ASASSN-V J173229.06-613712.5. A cool-spot model located on the more massive component was successfully implemented for each system. The derived parameters classify ASASSN-V J173229.06-613712.5 as a deep, low-mass-ratio contact binary. Its location in the tidal tail of Mamajek 4 constrains its age to <= 371 Myr, supporting the view that the total lifetime of some contact binaries may be as short as a few thermal timescales. After evaluating standard formation mechanisms, we propose that ASASSN-V J173229.06-613712.5 likely formed via efficient orbital hardening (potentially mediated by gas dynamical friction) during the early, gas-rich phase of its host cluster's evolution. This study demonstrates the value of young clusters and their tidal tails in providing robust age constraints to explore the formation and rapid evolution of contact binaries. |
| 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 | MAGNETIC BRAKING ; TX CNC ; EVOLUTION ; STARS ; LIGHT ; PERTURBATIONS ; PARAMETERS ; SAGITTAE ; CATALOG ; SYSTEMS |
| 资助项目 | National Natural Science Foundation of China[12273103]; National Natural Science Foundation of China[12573038]; Yunnan Fundamental Research Projects[202401AS070046]; Yunnan Fundamental Research Projects[202503AP140013]; International Partnership Program of Chinese Academy of Sciences[020GJHZ2023030GC]; Yunnan Revitalization Talent Support Program |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001765759100001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Natural Science Foundation of China[12273103, 12573038] ; Yunnan Fundamental Research Projects[202401AS070046, 202503AP140013] ; International Partnership Program of Chinese Academy of Sciences[020GJHZ2023030GC] ; Yunnan Revitalization Talent Support Program |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29222]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 通讯作者 | Liu L(刘亮) |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; LiuL@ynao.ac.cn; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China; 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100101, China; 4.University of Chinese Academy of Sciences, Beijing 101408, China |
| 推荐引用方式 GB/T 7714 | Xiang B,Liu L,Zhu LY,et al. W UMa-type Contact Binaries in the Tidal Tails of Young Open Clusters COIN-Gaia 25 and Mamajek 4[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2026,26(9). |
| APA | 项彬,刘亮,朱俐颖,施相东,&刘念平.(2026).W UMa-type Contact Binaries in the Tidal Tails of Young Open Clusters COIN-Gaia 25 and Mamajek 4.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,26(9). |
| MLA | 项彬,et al."W UMa-type Contact Binaries in the Tidal Tails of Young Open Clusters COIN-Gaia 25 and Mamajek 4".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 26.9(2026). |
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来源：云南天文台
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