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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; Li, Lin-Jia(Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China)
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2018
卷号18期号:1
DOI10.1088/1674-4527/18/1/11
产权排序第1完成单位
收录类别SCI
关键词Techniques: Photometric Stars: Variables: Delta Scuti Stars: Individual (Bo Lyn)
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.
项目资助者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)
语种英语
学科领域天文学
文章类型Article
ISSN1674-4527
URL查看原文
WOS记录号WOS:000428267100011
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LONG-TERM VARIABILITY
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12214
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Li, Lin-Jia(Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China)
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
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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,&Li, Lin-Jia.(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).
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