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Unveiling Bifurcated Blue Straggler Sequences in NGC 2173: Insights from Binary Evolution

文献类型：期刊论文

作者Wang, Li1,2; Jiang DK(姜登凯)3,4,5,6; Li, Chengyuan1,2; Deng, Licai7,8,9; Milone, Antonino P.10,11; Wang, Long1,2
刊名ASTROPHYSICAL JOURNAL
出版日期2025-05-01
卷号984期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/adc575
产权排序第3完成单位
文献子类Article
英文摘要Identifying bifurcated blue straggler (BS) sequences in color-magnitude diagrams (CMDs) of star clusters has long been regarded as a powerful diagnostic for distinguishing different BS formation mechanisms. While such bifurcations are typically associated with core-collapsed clusters, their detection in dynamically young clusters raises new questions about their origins. In this study, using high-precision proper motion data derived from Hubble Space Telescope multiepoch observations, we confirm the existence of two distinct BS sequences in the Large Magellanic Cloud cluster NGC 2173 (similar to 1.58 Gyr): a well-defined, narrow blue sequence and a sparser red sequence. The extended core region excludes collisional formation as a viable channel for BS formation. Our binary evolution models suggest that nonconservative mass transfer (MT) is essential for shaping the distribution of BS binaries in the CMD. The red sequence primarily comprises BS binaries formed through conservative ongoing MT. In contrast, the blue sequence BS binaries are formed through nonconservative post-MT processes, all involving white dwarf (WD) companions. These BS+WD binary systems may subsequently undergo a second MT phase, leading to the formation of double WD systems.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词WHITE-DWARF COMPANIONS ; MASS-TRANSFER ; STELLAR COLLISIONS ; GLOBULAR-CLUSTERS ; PRIMORDIAL BINARY ; STAR-CLUSTERS ; DYNAMICAL EVOLUTION ; DETAILED ANALYSIS ; MAIN-SEQUENCE ; MILKY-WAY
资助项目National Natural Science Foundation of China (NSFC)[12233013]; National Natural Science Foundation of China (NSFC)[12288102]; National Natural Science Foundation of China (NSFC)[12473033]; National Natural Science Foundation of China (NSFC)[12073070]; National Natural Science Foundation of China (NSFC)[12333008]; National Natural Science Foundation of China (NSFC)[12090040/3]; National Key R&D Program of China[2021YFA1600403]; Western Light Project of CAS[XBZG-ZDSYS-202117]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; Yunnan Revitalization Talent Support Program-Science & Technology Champion Project[202305AB350003]; Yunnan Fundamental NSFC Research Project[202201BC070003]; Yunnan Fundamental NSFC Research Project[202401BC070007]; Yunnan Ten Thousand Talents Plan Young & Elite Talents Project; INAF Research GTO-Grant Normal RSN; European Union; NSFC
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001476013100001
出版者IOP Publishing Ltd
资助机构National Natural Science Foundation of China (NSFC)[12233013, 12288102, 12473033, 12073070, 12333008, 12090040/3] ; National Key R&D Program of China[2021YFA1600403] ; Western Light Project of CAS[XBZG-ZDSYS-202117] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; Yunnan Revitalization Talent Support Program-Science & Technology Champion Project[202305AB350003] ; Yunnan Fundamental NSFC Research Project[202201BC070003, 202401BC070007] ; Yunnan Ten Thousand Talents Plan Young & Elite Talents Project ; INAF Research GTO-Grant Normal RSN ; European Union ; NSFC[21BAA00619] ; [PRIN 2022 2022MMEB9W] ; [2-1.05.12.05.10]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28292]  
专题云南天文台_大样本恒星演化研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.School of Physics and Astronomy, Sun Yat-sen University, Daxue Road, Zhuhai 519082, People's Republic of China; wangli79@mail2.sysu.edu.cn;
2.CSST Science Center for the Guangdong–Hong Kong–Macau Greater Bay Area, Zhuhai 519082, People's Republic of China;
3.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, People's Republic of China; dengkai@ynao.ac.cn;
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China;
5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China;
6.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
7.Key Laboratory for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China;
8.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
9.Department of Astronomy, School of Physics and Astronomy, China West Normal University, Nanchong 637002, People's Republic of China;
10.Dipartimento di Fisica e Astronomia "Galileo Galilei," Univ. di Padova, Vicolo dell'Osservatorio 3, Padova, IT-35122, Italy;
推荐引用方式
GB/T 7714		 Wang, Li,Jiang DK,Li, Chengyuan,et al. Unveiling Bifurcated Blue Straggler Sequences in NGC 2173: Insights from Binary Evolution[J]. ASTROPHYSICAL JOURNAL,2025,984(1).
APA Wang, Li,姜登凯,Li, Chengyuan,Deng, Licai,Milone, Antonino P.,&Wang, Long.(2025).Unveiling Bifurcated Blue Straggler Sequences in NGC 2173: Insights from Binary Evolution.ASTROPHYSICAL JOURNAL,984(1).
MLA Wang, Li,et al."Unveiling Bifurcated Blue Straggler Sequences in NGC 2173: Insights from Binary Evolution".ASTROPHYSICAL JOURNAL 984.1(2025).

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