Photometric analysis of 40 low mass-ratio contact binary systems in the Catalina Sky Survey

doi:10.1051/0004-6361/202451987

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	Photometric analysis of 40 low mass-ratio contact binary systems in the Catalina Sky Survey
	Wang JL(王锦良)1,2 ; 丁旭(1,2,3,4★); Liu, Wei 5; Yu LH(于立欢)1,2 ; Xu C(徐冲)1,2 ; Ji KF(季凯帆)1,2,3,4
发表期刊	ASTRONOMY & ASTROPHYSICS
	2025-01-10
卷号	693
DOI	10.1051/0004-6361/202451987
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	methods: data analysis techniques: photometric binaries: close stars: evolution
摘要	Low mass-ratio contact binary systems are a fascinating class of eclipsing binaries; they are widely regarded as the potential progenitors of stellar mergers. For this study we analyzed 40 newly discovered low mass-ratio totally eclipsing contact binary systems identified from the Catalina Sky Survey data. The relative parameters for these systems were inferred using a neural network model combined with a Bayesian inference-based Hamiltonian Monte Carlo (HMC) algorithm, with uncertainties estimated from the posterior distributions generated by the HMC algorithm. The absolute parameters were then calculated using these relative parameters, along with distances and temperatures provided by Gaia Data Release 3. Among the 40 systems, 24 are deep low mass-ratio overcontact binaries, characterized by fill-out factors of 0.5 or higher and mass ratios of 0.25 or lower. Notably, two systems, CSS_J071952.5+243224 and CSS_J155519.0+135855, have mass ratios below 0.1, specifically 0.094 +/- 0.006 and 0.086 +/- 0.004, respectively. Furthermore, we compared the parameters obtained in this study with those from 39 low mass-ratio contact binary systems identified in previous research, finding that the estimated parameters are largely consistent. Finally, to evaluate the evolutionary status of the 40 systems, we calculated the ratio of spin angular momentum to orbital angular momentum for each and found that all are currently in a relatively stable evolutionary phase.
资助项目	Natural Science Foundation of China[12103088]; Natural Science Foundation of China[12433009]
项目资助者	Natural Science Foundation of China[12103088, 12433009]
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	EDP SCIENCES S A
出版地	17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN	0004-6361
URL	查看原文
WOS记录号	WOS:001395031500007
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	BOLOMETRIC CORRECTIONS ; DEEP ; PARAMETERS ; STABILITY ; EVOLUTION ; ORIGIN ; PERIOD
EI入藏号	20250317688908
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/114a53/28002
专题	天文技术实验室大样本恒星演化研究组南方基地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, Kunming 650216, PR China; 2.University of Chinese Academy of Sciences, Beijing 100049, PR China; 3.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, 650216 Kunming, PR China; 4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, PR China; 5.College of Physics and Electronic Engineering, Xingtai University, Xingtai 054001, PR 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	Wang JL,Ding X,Liu, Wei,et al. Photometric analysis of 40 low mass-ratio contact binary systems in the Catalina Sky Survey[J]. ASTRONOMY & ASTROPHYSICS,2025,693.
APA	王锦良,丁旭,Liu, Wei,于立欢,徐冲,&季凯帆.(2025).Photometric analysis of 40 low mass-ratio contact binary systems in the Catalina Sky Survey.ASTRONOMY & ASTROPHYSICS,693.
MLA	王锦良,et al."Photometric analysis of 40 low mass-ratio contact binary systems in the Catalina Sky Survey".ASTRONOMY & ASTROPHYSICS 693(2025).

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