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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
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2018
Volume18Issue:1
DOI10.1088/1674-4527/18/1/11
Contribution Rank第1完成单位
Indexed BySCI
KeywordTechniques: Photometric Stars: Variables: Delta Scuti Stars: Individual (Bo Lyn)
Abstract

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.

Funding ProjectNSF[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]
Funding OrganizationNSF[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]
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000428267100011
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLONG-TERM VARIABILITY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12214
Collection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
Corresponding AuthorLi LJ(李临甲)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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).
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