Study of 26 Galactic Open Clusters with Extended Main-sequence Turnoffs

doi:10.1088/1674-4527/ad3dc5

	Study of 26 Galactic Open Clusters with Extended Main-sequence Turnoffs
	Deng YY(邓阳阳)1,2,3; Li, Zhong-Mu 1
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2024-06-01
卷号	24 期号:6
关键词	(stars:) binaries: general Galaxy: fundamental parameters (Galaxy:) open clusters and associations: general (stars:) Hertzsprung-Russell and C-M-diagrams
ISSN号	1674-4527
DOI	10.1088/1674-4527/ad3dc5
产权排序	第1完成单位
文献子类	Article
英文摘要	Recent studies indicate that some Galactic open clusters (OCs) exhibit extended main-sequence turnoff (eMSTO) in their color-magnitude diagrams (CMDs). However, the number of Galactic OCs with eMSTO structures detected so far is limited, and the reasons for their formation are still unclear. This work identifies 26 Galactic OCs with undiscovered eMSTOs and investigates the causes of these features. Stellar population types and fundamental parameters of cluster samples are acquired using CMD fitting methods. Among them, the results of 11 OCs are reliable as the observed CMDs are well-reproduced. We propose the crucial role of stellar binarity and confirm the importance of stellar rotation in reproducing eMSTO morphologies. The results also show that the impact of age spread is important, as it can adequately explain the structure of young OCs and fit the observed CMDs of intermediate-age OCs better.
学科主题	天文学 ; 恒星与银河系
URL标识	查看原文
出版地	20A DATUN RD, CHAOYANG, BEIJING, 100101, PEOPLES R CHINA
资助项目	Yunnan Academician Workstation of Wang Jingxiu[202005AF150025]; China Manned Space Project[ghfund202302019167]; Natural Science Foundation of Yunnan Province[202201BC070003]
WOS关键词	COLOR-MAGNITUDE DIAGRAM ; STELLAR ROTATION ; STAR-CLUSTERS ; BINARY FRACTION ; LISC CATALOG ; EVOLUTION ; ISOCHRONES ; TRACKS ; II.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:001227775600001
资助机构	Yunnan Academician Workstation of Wang Jingxiu[202005AF150025] ; China Manned Space Project[ghfund202302019167] ; Natural Science Foundation of Yunnan Province[202201BC070003]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/27210]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.Institute of Astronomy and Information, Dali University, Dali 671003, China 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; dengyangyang@ynao.ac.cn;
推荐引用方式 GB/T 7714	Deng YY,Li, Zhong-Mu. Study of 26 Galactic Open Clusters with Extended Main-sequence Turnoffs[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2024,24(6).
APA	邓阳阳,&Li, Zhong-Mu.(2024).Study of 26 Galactic Open Clusters with Extended Main-sequence Turnoffs.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,24(6).
MLA	邓阳阳,et al."Study of 26 Galactic Open Clusters with Extended Main-sequence Turnoffs".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 24.6(2024).