Pulsations of the SX Phe Star BL Camelopardalis

doi:10.1088/1538-3873/ab0a1a

	Pulsations of the SX Phe Star BL Camelopardalis
	Feng, Guo Jie1,2 ; Yang, Tao Zhi1 ; Bai, Chun Hai1 ; Zhang, Yu1 ; Zong, Peng1,2 ; Esamdin, Ali1,2 ; Fu, Jian Ning 3; Liu, Jin Zhong1 ; Niu, Hu Biao1,3
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
	2019-06-01
卷号	131 期号:1000 页码:9
关键词	stars: variables: delta Scuti
ISSN号	0004-6280
DOI	10.1088/1538-3873/ab0a1a
通讯作者	Esamdin, Ali()
英文摘要	We 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.
资助项目	Nanshan 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关键词	DELTA-SCUTI ; PHOENICIS STARS ; PERIOD CHANGES ; PHOTOMETRY ; GD-428
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000466271400001
资助机构	Nanshan 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
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/2622]
专题	新疆天文台_光学天文与技术应用研究室
通讯作者	Esamdin, Ali
作者单位	1.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
推荐引用方式 GB/T 7714	Feng, Guo Jie,Yang, Tao Zhi,Bai, Chun Hai,et al. Pulsations of the SX Phe Star BL Camelopardalis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2019,131(1000):9.
APA	Feng, Guo Jie.,Yang, Tao Zhi.,Bai, Chun Hai.,Zhang, Yu.,Zong, Peng.,...&Niu, Hu Biao.(2019).Pulsations of the SX Phe Star BL Camelopardalis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,131(1000),9.
MLA	Feng, Guo Jie,et al."Pulsations of the SX Phe Star BL Camelopardalis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 131.1000(2019):9.