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Identification and period investigation of pulsation variable star UY Camelopardalis, an RR Lyrae star in binary system
Li LJ(李临甲)1,2,3; Qian SB(钱声帮)1,2,3,4; Voloshina, Irina5; Metlov, Vladimir G.5; Zhu LY(朱俐颖)1,2,3,4; Liao WP(廖文萍)1,2,3
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018-08-01
卷号70期号:4页码:11
DOI10.1093/pasj/psy061
产权排序第1完成单位
收录类别SCI ; EI
关键词binaries: general stars: individual (UY Camelopardalis) stars: variables: RR Lyrae techniques: photometric
摘要

We present photometric measurements of the short period variable star UY Cam, which has been classified as a delta Scuti or c-type RR Lyrae (RRc) variable in different catalogs. Based on the analyses on Fourier coefficients and (NUV - V)(0), we find that UY Cam is probably an RRc star. We obtain 58 new times of light maximum for UY Cam based on several sky surveys and our observations. Combining these with the times of light maximum in literature, a total of 154 times of light maximum are used to analyze the O - C diagram of UY Cam. The results show that the O - C pattern can be described by a downward parabolic component with a rate of -6.86 +/- 0.47 x 10(-11) dd(-1), and a cyclic variation with a period of 65.7 +/- 2.4 yr. We suppose these components are caused by the stellar evolution and the light travel time effect (LiTE) of a companion in elliptical orbit, respectively. By calculation, the minimum mass of the potential companion is about 0.17M(circle dot), and its mass should be less than or equal to the pulsation primary star when the inclination i > 22.degrees 5. Therefore, the companion should be a low-mass star, like a late-type main-sequence star or a white dwarf. Due to the unique property of UY Cam, we suggest that more observations and studies on UY Cam and other RRc stars are needed to check the nature of these stars, including the pulsations and binarities.

资助项目NSF[AST-0407380] ; NSF[AST-0909073] ; NSF[AST-1313370] ; West Light Foundation of Chinese Academy of Sciences ; Russian Foundation for Basic Research[17-52-53200] ; National Natural Science Foundation of China[11325315] ; National Natural Science Foundation of China[11573063] ; National Natural Science Foundation of China[11611530685] ; Yunnan Natural Science Foundation[2013FB084] ; Yunnan Natural Science Foundation[2014FB187] ; Yunnan Natural Science Foundation[2017FA001]
项目资助者NSF[AST-0407380, AST-0909073, AST-1313370] ; West Light Foundation of Chinese Academy of Sciences ; Russian Foundation for Basic Research[17-52-53200] ; National Natural Science Foundation of China[11325315, 11573063, 11611530685] ; Yunnan Natural Science Foundation[2013FB084, 2014FB187, 2017FA001]
语种英语
学科领域天文学 ; 恒星与银河系
学科门类理学 ; 理学::天文学
文章类型Article
出版者OXFORD UNIV PRESS
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0004-6264
URL查看原文
WOS记录号WOS:000456069400015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MONOPERIODIC DELTA-SCUTI ; O-C DIAGRAMS ; SX-PHOENICIS ; LIGHT CURVES ; FOURIER DECOMPOSITION ; ULTRAVIOLET ; PHOTOMETRY ; VARIABILITY ; EVOLUTION ; EXPLORER
EI入藏号20215211378542
EI主题词Cams
EI分类号431 Air Transportation - 432 Highway Transportation - 433 Railroad Transportation - 434 Waterway Transportation - 601.3 Mechanisms - 657.2 Extraterrestrial Physics and Stellar Phenomena - 921 Mathematics - 941.4 Optical Variables Measurements
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/19103
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 LJ(李临甲)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, 650216, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming, 650216, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China
4.University of Chinese Academy of Sciences, 100049 Beijing, China/Yuquan Road 19#, Sijingshang Block, Beijing, 100049, China
5.Sternberg Astronomical Institute,Moscow State University, Universitetskij prospect 13, Moscow 119992, Russia
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
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Li LJ,Qian SB,Voloshina, Irina,et al. Identification and period investigation of pulsation variable star UY Camelopardalis, an RR Lyrae star in binary system[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2018,70(4):11.
APA Li LJ,Qian SB,Voloshina, Irina,Metlov, Vladimir G.,Zhu LY,&Liao WP.(2018).Identification and period investigation of pulsation variable star UY Camelopardalis, an RR Lyrae star in binary system.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,70(4),11.
MLA Li LJ,et al."Identification and period investigation of pulsation variable star UY Camelopardalis, an RR Lyrae star in binary system".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 70.4(2018):11.
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