High amplitude delta Scuti star BO Lyn with evidence of a late A-type companion in an elliptical orbit

doi:10.1088/1674-4527/18/1/11

	High amplitude delta Scuti star BO Lyn with evidence of a late A-type companion in an elliptical orbit
	Li LJ(李临甲)1,2,3 ; Qian SB(钱声帮)1,2,3,4 ; Zhang J(张嘉)1,2,3 ; Zhu LY(朱俐颖)1,2,3,4 ; Liao WP(廖文萍)1,2,3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2018
卷号	18 期号:1
关键词	Techniques: Photometric Stars: Variables: Delta Scuti Stars: Individual (Bo Lyn)
ISSN号	1674-4527
DOI	10.1088/1674-4527/18/1/11
产权排序	第1完成单位
文献子类	Article
英文摘要	We present 145 times of light maximum for high amplitude delta Scuti star BO Lyn based on several sky surveys (CRTS, DASCH, NSVS, OMC and SuperWASP) and our photometric observations. Combining with the data in literature, a total of 179 times of light maximum are used to analyze the O - C diagram of BO Lyn. We find that it can be described by an upward parabolic component and a periodic variation with a period of 34.5 +/- 0.1 yr. The latter could be caused by the light travel time effect as a result of an additional companion orbiting in a highly elliptical orbit (e = 0.64 +/- 0.03). Our study indicates that the companion's luminosity cannot be ignored, and it should be a late A-type main-sequence star. The long-term period change of BO Lyn is also detected, and its value, 1.52 +/- 0.26 x 10(-3) d Myr(-1), is consistent with evolutionary models. We suggest that more spectroscopic and photometric observations are needed in the future to confirm the nature of the BO Lyn system.
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, 100012, PEOPLES R CHINA
资助项目	NSF[AST-0407380] ; NSF[AST-0909073] ; NSF[AST-1313370] ; West Light Foundation of Chinese Academy of Sciences ; National Natural Science Foundation of China[11325315] ; National Natural Science Foundation of China[11573063] ; Yunnan Natural Science Foundation[2013FB084] ; Yunnan Natural Science Foundation[2014FB187 ; Yunnan Natural Science Foundation[2017FA001] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences([XDB09010202]
WOS关键词	LONG-TERM VARIABILITY
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:000428267100011
资助机构	NSF[AST-0407380, AST-0909073, AST-1313370] ; West Light Foundation of Chinese Academy of Sciences ; National Natural Science Foundation of China[11325315, 11573063] ; Yunnan Natural Science Foundation[2013FB084, 2014FB187, 2017FA001] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences([XDB09010202]
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/12214]
专题	云南天文台_双星与变星研究组云南天文台_中国科学院天体结构与演化重点实验室
通讯作者	Li LJ(李临甲)
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China 2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, China 4.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Li LJ,Qian SB,Zhang J,et al. High amplitude delta Scuti star BO Lyn with evidence of a late A-type companion in an elliptical orbit[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(1).
APA	Li LJ,Qian SB,Zhang J,Zhu LY,&Liao WP.(2018).High amplitude delta Scuti star BO Lyn with evidence of a late A-type companion in an elliptical orbit.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(1).
MLA	Li LJ,et al."High amplitude delta Scuti star BO Lyn with evidence of a late A-type companion in an elliptical orbit".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.1(2018).