The high-amplitude delta Scuti variable CY Aqr is probably a triple system

	The high-amplitude delta Scuti variable CY Aqr is probably a triple system
	Fang, Wei-Jing 1; Luo, Zhi-Quan 1; Zhang, Xiao-Bin2 ; Deng, Li-Cai2 ; Wang, Kun2 ; Luo, Yang-Ping1 ; Pan, Yang 1; Peng, Yin-Jiang 1
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2016-06-01
卷号	16 期号:6
关键词	methods: data analysis stars: variables: delta Scuti stars: individual (CY Aqr)
英文摘要	Data representing 864 times of light maxima of the high-amplitude delta Scuti star CY Aqr were collected from the literature, based on which, long-term period changes of the variable star were investigated. A revised period and new ephemerides were given for the pulsating star. Remarkable cyclic variations were found in the O - C residuals which can be attributed to the light-time effects due to probable unseen components of the object. By using Kopal's method, the orbital parameters of the supposed component stars were derived. The solution suggests that CY Aqr is very probably in a triple system orbited eccentrically by two low-mass companions with periods of 54.2 and 47.3 yr. The lower limits on masses were estimated as 0.04 M-circle dot and 0.02 M-circle dot, respectively, for the two hidden companions.
收录类别	SCI
语种	英语
WOS记录号	WOS:000377524600011
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5338]
专题	国家天文台_光学天文研究部
作者单位	1.China West Normal Univ, Phys & Space Sci Coll, Nanchong 637002, Peoples R China 2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Fang, Wei-Jing,Luo, Zhi-Quan,Zhang, Xiao-Bin,et al. The high-amplitude delta Scuti variable CY Aqr is probably a triple system[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(6).
APA	Fang, Wei-Jing.,Luo, Zhi-Quan.,Zhang, Xiao-Bin.,Deng, Li-Cai.,Wang, Kun.,...&Peng, Yin-Jiang.(2016).The high-amplitude delta Scuti variable CY Aqr is probably a triple system.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(6).
MLA	Fang, Wei-Jing,et al."The high-amplitude delta Scuti variable CY Aqr is probably a triple system".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.6(2016).