NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System

doi:10.3847/1538-4357/ace8fe

YNAO OpenIR > 双星与变星研究组

	NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System
	Meng FB(孟芳斌)1,2,3 ; Zhu LY(朱俐颖)1,2,3 ; Qian SB(钱声帮)1,2,3 ; Liu NP(刘念平)1,3 ; Li LJ(李临甲)1,3 ; Matekov, Azizbek1,2,4
发表期刊	ASTROPHYSICAL JOURNAL
	2023-09-01
卷号	954 期号:2
DOI	10.3847/1538-4357/ace8fe
产权排序	第1完成单位
收录类别	SCI
摘要	The first detailed photometric and spectroscopic study of G-type short-period binary NY Boo is presented. The radial velocity curve was obtained by the cross-correlation function (CCF) method based on LAMOST and SDSS spectra, which derived its mass ratio as q = 0.139(1/7.2). The CCF profiles of the SDSS spectra clearly show the existence of a cool third component, which is supported by the results of the orbital period investigation. The period study based on the O-C analysis indicates that besides a long-term decrease, the orbital period has a periodic oscillation due to the light-travel time effect caused by a third body. When the third light contribution is consistent with the CCF results, the orbit of the third body and the inner pair are non-coplanar with m3 = 0.31M(circle dot). Combining with the TESS light curves, it is found that the target is a deep and low-mass-ratio contact binary (DLMRCB) with a fill-out factor of f = 73%. The notable asymmetry in light curves was detected and explained by the spot model very well. The spectroscopic profiles, the cyclic variation in the O-C diagram, and the radial velocity curve and light-curve solutions all suggest that NY Boo is a hierarchical triple system with a cool tertiary component orbiting around an active DLMRCB. With the orbital period shrinking, the binary may eventually merge. The period of NY Boo decreases faster than other shrinking DLMRCB, together with active inner pair and non-coplanar tertiary component, making NY Boo an important target for studying the late evolution of binaries.
项目资助者	This work is supported by the National Natural Science Foundation of China (Nos. 11922306 and 11933008) and the International Cooperation Projects of the National Key Ramp ; amp ; D Program (No. 2022YFE0127300). We sincerely thank TESS for releasing high-prec[11933008, 2022YFE0127300] ; National Natural Science Foundation of China ; International Cooperation Projects of the National Key Ramp ; amp ; D Program ; team of LAMOST ; [11922306]
语种	英语
学科领域	天文学 ; 恒星与银河系 ; 恒星形成与演化
文章类型	Article
出版者	IOP Publishing Ltd
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:001056777700001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	CLOSE-BINARY ; RADIAL-VELOCITY ; ADDITIONAL COMPONENTS ; PERIOD CHANGES ; LIGHT CURVES ; STARS ; PARAMETERS ; VARIABILITY ; ABSOLUTE ; TERTIARY
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/26204
专题	双星与变星研究组中国科学院天体结构与演化重点实验室
通讯作者	Zhu LY(朱俐颖)
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences (CAS), 650216, Kunming, People's Republic of China; [email protected] 2.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, 101408, Beijing, People’s Republic of China 3.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216, Kunming, People's Republic of China 4.Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences, 33 Astronomicheskaya str., Tashkent, 100052, Uzbekistan
第一作者单位	中国科学院云南天文台
通讯作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Meng FB,Zhu LY,Qian SB,et al. NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System[J]. ASTROPHYSICAL JOURNAL,2023,954(2).
APA	Meng FB,Zhu LY,Qian SB,Liu NP,Li LJ,&Matekov, Azizbek.(2023).NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System.ASTROPHYSICAL JOURNAL,954(2).
MLA	Meng FB,et al."NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System".ASTROPHYSICAL JOURNAL 954.2(2023).

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