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Pulsations of the SX Phe Star BL Camelopardalis
Zong, Peng1,2; Esamdin, Ali1,2; Fu, Jian Ning3; Niu, Hu Biao1,3; Feng, Guo Jie1,2; Yang, Tao Zhi1; Bai, Chun Hai1; Zhang, Yu1; Liu, Jin Zhong1
2019-06-01
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
ISSN0004-6280
Volume131Issue:1000Pages:064202
Contribution Rank1
AbstractWe carried out photometric observations of the SX Phe star BL Cam in 2014, 2017, and 2018 using Nanshan 1-m telescope. In addition to the dominated frequency of 25.5790 (3) cd(-1) and its two harmonics, an independent frequency of 25.247 (2) cd(-1), which is a nonradial mode frequency, was detected from the data in 2014. A total of 123 new times of light maxima were determined from our light curves in the three years, which, together with that published in the literature, were used to analyze the O- C diagram. The change rate of the main period was derived as (1/P)(dP/dt) = -2.39 (8) x 10(-8) yr(-1), which is lower than that published in previous literature. A periodical change with a period of 14.01 (9) yr was found in the residuals of the O-C curve fitting. If it was caused by the light-time effect, BL Cam should be a binary system. The mass of the companion was restricted as low as that of a brown dwarf. No evidence of the triple system suggested by previous authors was shown in our analysis.
Keywordstars: variables: delta Scuti
DOI10.1088/1538-3873/ab0a1a
Indexed BySCI
Language英语
WOS KeywordDELTA-SCUTI ; PHOENICIS STARS ; PERIOD CHANGES ; PHOTOMETRY ; GD-428
Funding ProjectNanshan 1 m telescope of Xinjiang Astronomical Observatory, light in China's Western Region[2015-XBQN-A-02] ; Nanshan 1 m telescope of Xinjiang Astronomical Observatory, light in China's Western Region[XBBS-2014-25.] ; National Natural Science Fundation of China[11873081] ; National Natural Science Fundation of China[11673003] ; National Natural Science Fundation of China[11833002] ; National Natural Science Fundation of China[11661161016] ; 2017 Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000466271400001
PublisherIOP PUBLISHING LTD
Funding OrganizationNanshan 1 m telescope of Xinjiang Astronomical Observatory, light in China's Western Region ; National Natural Science Fundation of China ; 2017 Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China
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Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/2623
Collection光学天文与技术应用研究室
Corresponding AuthorEsamdin, Ali
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zong, Peng,Esamdin, Ali,Fu, Jian Ning,et al. Pulsations of the SX Phe Star BL Camelopardalis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2019,131(1000):064202.
APA Zong, Peng.,Esamdin, Ali.,Fu, Jian Ning.,Niu, Hu Biao.,Feng, Guo Jie.,...&Liu, Jin Zhong.(2019).Pulsations of the SX Phe Star BL Camelopardalis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,131(1000),064202.
MLA Zong, Peng,et al."Pulsations of the SX Phe Star BL Camelopardalis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 131.1000(2019):064202.
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