PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VI. THE NEWLY DISCOVERED oEA STAR FR ORIONIS

	PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VI. THE NEWLY DISCOVERED oEA STAR FR ORIONIS
	Yang, Y. -G.1,2; Wei, J. -Y.2 ; Li, H. -L.2
刊名	ASTRONOMICAL JOURNAL
	2014-02-01
卷号	147 期号:2
关键词	binaries: eclipsing stars: individual (FR Orionis) stars: variables: delta Scuti
英文摘要	New photometry of the neglected eclipsing binary FR Orionis was obtained in 2012 November and December. Using the updated Wilson-Devinney program, the photometric elements were deduced from two-color light curves. The results indicate that this system is a semi-detached binary, with a mass ratio of 0.325(+/- 0.002) and a fill-out factor of the primary of f(p) = 73.5(+/- 0.2)%. The oscillating light curves imply that FR Ori may be an oscillating EA (oEA)-type star with a rapidly pulsating, mass-accreting primary component. After we removed the theoretical light curves from the observations, Fourier analysis revealed that the more massive component possibly shows a delta Scuti type pulsation with four detected frequencies. The dominant frequency is f(1) = 38.6c day(-1) (i.e., P-puls = 37.3minutes), and the pulsation constant is Q = 0.014 days. Based on all available eclipsing times, the orbital period is undergoing a secular period increase with a rate of dP/dt = + 8.85(+/- 0.66) x10(-8) day yr(-1), which may be interpreted by mass transfer from the secondary to the primary. We expect that the more massive component will fill its Roche lobe due to mass transfer of the secondary. Therefore, the oEA star FR Ori may evolve into a contact configuration.
收录类别	SCI
语种	英语
WOS记录号	WOS:000329837100011
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6560]
专题	国家天文台_空间科学研究部
作者单位	1.Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Yang, Y. -G.,Wei, J. -Y.,Li, H. -L.. PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VI. THE NEWLY DISCOVERED oEA STAR FR ORIONIS[J]. ASTRONOMICAL JOURNAL,2014,147(2).
APA	Yang, Y. -G.,Wei, J. -Y.,&Li, H. -L..(2014).PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VI. THE NEWLY DISCOVERED oEA STAR FR ORIONIS.ASTRONOMICAL JOURNAL,147(2).
MLA	Yang, Y. -G.,et al."PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VI. THE NEWLY DISCOVERED oEA STAR FR ORIONIS".ASTRONOMICAL JOURNAL 147.2(2014).