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Discovery and Characterization of the Totally Eclipsing Binary TIC 189854044 in the Young Open Cluster ASCC 23

文献类型：期刊论文

作者Chi, Huanbin1,4; Zhang, Guorui3; Tian, Xuefen1; Yang, Yuan1; Ding X(丁旭)2; Chang, Linfeng1; Yang, Jingcheng1; Wang, Feng4,7; Chen, Jing6; Liu, Yiqin5
刊名ASTRONOMICAL JOURNAL
出版日期2026-04-01
卷号171期号:4
ISSN号0004-6256
DOI10.3847/1538-3881/ae4319
产权排序第4完成单位
文献子类Article
英文摘要Mass segregation is a fundamental prediction of dynamical relaxation in stellar systems, yet direct evidence in young open clusters remains scarce. Here, we report the discovery and characterization of a totally eclipsing binary system (TIC 189854044) in the core of the young open cluster ASCC 23. By combining multiwavelength photometry from Gaia, 2MASS, and Pan-STARRS, we employed a machine learning approach to identify robust cluster members and applied Bayesian inference to determine the cluster's fundamental parameters. Detailed modeling of the binary's light curve yields precise physical parameters. The eclipsing binary TIC 189854044, located in the core region of ASCC 23, exhibits a total system mass of 2.86M circle dot. Statistical analysis using the Minimum Spanning Tree technique, we find that the cluster has not yet undergone global dynamical mass segregation. This lack of global segregation highlights the unique status of TIC 189854044. Situated deep within the cluster core, this massive binary stands in contrast to the surrounding spatially unsegregated population, suggesting it may have formed in situ or experienced rapid localized sedimentation. This system serves as a valuable benchmark for testing binary evolution models in young, dynamical environments.
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MASS SEGREGATION ; STAR-CLUSTERS ; PARAMETERS
资助项目Natural Science Foundationof China[12433012]; Natural Science Foundationof China[12373097]; Natural Science Foundationof China[12573114]; Natural Science Foundationof China[12103088]; Chinese Academy of Sciences (CAS)[xbzg-zdsys-202410]; Yunnan Basic Research Program[202501AT070027]; Yunnan Province XingDian Talent Support Program
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001707997300001
出版者IOP Publishing Ltd
资助机构Natural Science Foundationof China[12433012, 12373097, 12573114, 12103088] ; Chinese Academy of Sciences (CAS)[xbzg-zdsys-202410] ; Yunnan Basic Research Program[202501AT070027] ; Yunnan Province XingDian Talent Support Program
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/29027]  
专题天文技术实验室
通讯作者Tian, Xuefen
作者单位1.School of Artificial Intelligence, Yunnan Open University, Kunming 650599, People’s Republic of China; 18382204138@163.com;
2.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216, Kunming, People’s Republic of China;
3.Xishuangbanna Vocational and Technical College, Jinghong 666100, People’s Republic of China;
4.Center For Astrophysics, Guangzhou University, Guangzhou, Guangdong 510006, People’s Republic of China; fengwang@gzhu.edu.cn;
5.School of Artificial Intelligence, Yunnan Open University, Kunming 650500, People’s Republic of China
6.Dali University, No. 2, Hongsheng Road, Gucheng, Dali, Yunnan, Dali 671003, People’s Republic of China; chenjing05@tsinghua.org.cn;
7.Great Bay Center, National Astronomical Data Center, Guangzhou, Guangdong 510006, People’s Republic of China;
推荐引用方式
GB/T 7714		 Chi, Huanbin,Zhang, Guorui,Tian, Xuefen,et al. Discovery and Characterization of the Totally Eclipsing Binary TIC 189854044 in the Young Open Cluster ASCC 23[J]. ASTRONOMICAL JOURNAL,2026,171(4).
APA Chi, Huanbin.,Zhang, Guorui.,Tian, Xuefen.,Yang, Yuan.,丁旭.,...&Liu, Yiqin.(2026).Discovery and Characterization of the Totally Eclipsing Binary TIC 189854044 in the Young Open Cluster ASCC 23.ASTRONOMICAL JOURNAL,171(4).
MLA Chi, Huanbin,et al."Discovery and Characterization of the Totally Eclipsing Binary TIC 189854044 in the Young Open Cluster ASCC 23".ASTRONOMICAL JOURNAL 171.4(2026).

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来源：云南天文台

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