OO Aquilae:a solar-type contact binary with intrinsic light curve changes

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	OO Aquilae:a solar-type contact binary with intrinsic light curve changes
	Li Huali 1; Wei Jianyan 1; Yang Yuangui 2; Dai Haifeng 2
刊名	Research in Astronomy and Astrophysics
	2016
卷号	16 期号:1 页码:02
ISSN号	1674-4527
英文摘要	New multi-color photometry of the solar-type contact binary OO Aql was obtained in 2012 and 2013, using the 60 cm telescope at Xinglong Station of the National Astronomical Observatories, Chinese Academy of Sciences. From two sets of light curves LC_1 and LC_2, photometric models were performed by using the 2003 version of the Wilson-Devinney code. The overcontact factor of the binary system was determined to be f = 37.0(±0.5)%. The intrinsic variability of this binary occurs in light maxima and minima, which could result from a possible third component and magnetic activity of the late type components. Based on all available light minimum times, the orbital period may change in a complicated mode, i.e., sudden period jumps or continuous period variations. The period of OO Aql may possibly undergo a secular period decrease with a rate of dP/dt = –3.63(±0.30)× 10~(–8) d yr~(–1), superimposed by two possible cyclic variations in the O – C curve. The long-term period decrease may be interpreted as conserved mass transfer from the more massive component to the less massive one. The 21.5-yr oscillation may be attributed to cyclic magnetic activity, and the 69.3-yr one may result from the light-time effect of an unseen tertiary body.
语种	英语
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/51650]
专题	中国科学院国家天文台
作者单位	1.中国科学院国家天文台 2.淮北师范大学信息学院
推荐引用方式 GB/T 7714	Li Huali,Wei Jianyan,Yang Yuangui,et al. OO Aquilae:a solar-type contact binary with intrinsic light curve changes[J]. Research in Astronomy and Astrophysics,2016,16(1):02.
APA	Li Huali,Wei Jianyan,Yang Yuangui,&Dai Haifeng.(2016).OO Aquilae:a solar-type contact binary with intrinsic light curve changes.Research in Astronomy and Astrophysics,16(1),02.
MLA	Li Huali,et al."OO Aquilae:a solar-type contact binary with intrinsic light curve changes".Research in Astronomy and Astrophysics 16.1(2016):02.