Determination method for binary fractions using the integrated spectrum

doi:10.1093/mnras/stae1346

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	Determination method for binary fractions using the integrated spectrum
	Zhang FH(张奉辉)1,2,3 ; Li LF(李立芳)1,2,3 ; Han ZW(韩占文)1,2,3 ; Wang XG(王小刚)1,2,4
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2024-06-11
卷号	531 期号:3 页码:3468-3478
DOI	10.1093/mnras/stae1346
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	binaries: general Galaxy: evolution globular clusters: general galaxies: fundamental parameters galaxies:clusters
摘要	We need to resolve the individual stars for binary-fraction determinations of stellar systems. Therefore, it is not possible to obtain the binary fractions for dense or distant stellar systems. We propose a method to determine the binary fraction of a dense or distant stellar system: this method is first to determine the binary-fraction variation for any two adjacent regions and then to add up those binary-fraction variations along the radial direction to obtain the binary fraction for a stellar system. The binary-fraction variation is derived using 10 binary-fraction-sensitive spectral absorption feature indices (SAFIs) and the binary-fraction variation calibrations in terms of these SAFIs. Using this method, we first present the binary-fraction variations for 21 Galactic globular clusters (GCs). By comparison, we find that they agree well with the binary fractions based on the main-sequence fiducial line method from previous studies. This verifies that the above-mentioned method is feasible. Next, we present the binary-fraction variations of 13 Galactic GCs. We give the relationships between the binary fraction and various parameters, and find that the binary fraction is negatively correlated with N-HB and N-RR, the binary fraction of some studies is not strongly correlated with NBS, and the number of GCs with large binary fraction is greater for the extreme blue horizontal branch population ratio. Finally, if we want to obtain a more accurate binary fraction, we suggest that spectroscopic and photometric observations are conducted at an appropriate area interval for a stellar system.
资助项目	Natural Science Foundation of China[11973081]; National Natural Science Foundation of China[CMS-CSST-2021-A08]; China Manned Space Project[202302AN360001]; International Centre of Supernovae, Yunnan Key Laboratory
项目资助者	Natural Science Foundation of China[11973081] ; National Natural Science Foundation of China[CMS-CSST-2021-A08] ; China Manned Space Project[202302AN360001] ; International Centre of Supernovae, Yunnan Key Laboratory
语种	英语
学科领域	天文学 ; 恒星与银河系
文章类型	Article
出版者	OXFORD UNIV PRESS
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN	0035-8711
URL	查看原文
WOS记录号	WOS:001244398000009
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	SUBDWARF-B-STARS ; POPULATION SYNTHESIS ; STELLAR POPULATION ; GLOBULAR-CLUSTERS ; ORIGIN ; BULGE
EI入藏号	20242516278568
EI主题词	Stars
EI分类号	657.2 Extraterrestrial Physics and Stellar Phenomena
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27407
专题	大样本恒星演化研究组中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, China; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, China; 3.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China; 4.University of Chinese Academy of Sciences, Beijing 100049, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Zhang FH,Li LF,Han ZW,et al. Determination method for binary fractions using the integrated spectrum[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,531(3):3468-3478.
APA	张奉辉,李立芳,韩占文,&王小刚.(2024).Determination method for binary fractions using the integrated spectrum.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,531(3),3468-3478.
MLA	张奉辉,et al."Determination method for binary fractions using the integrated spectrum".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 531.3(2024):3468-3478.

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