Orbital parameters and period variation studies of the short-period eclipsing binaries FG Sct, VZ Lib and VZ Psc

doi:10.1088/1674-4527/19/7/97

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	Orbital parameters and period variation studies of the short-period eclipsing binaries FG Sct, VZ Lib and VZ Psc
	Yuc, Qiang 1,2,3; Zhang, Li-Yun 1,2,3; Han, Xian-Ming L.1,2,3,4; Lu, Hong-Peng 1,2,3; Long, Liu 1,2,3; Yan, Yan 3,5
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2019-07-01
卷号	19 期号:7 页码:20
关键词	stars: binaries: eclipsing stars: individual (FG Sct, VZ Lib, VZ Psc) stars: starspot
ISSN号	1674-4527
DOI	10.1088/1674-4527/19/7/97
英文摘要	We present eight sets of new light curves for binaries FG Sct, VZ Lib and VZ Psc, which are all contact eclipsing binaries with short orbital periods. We carried out our observations from 2016 to 2017 using the 60-cm telescope administered by National Astronomical Observatories, Chinese Academy of Sciences, the Holcomb Observatory at Butler University and the SARA-CT telescope in Chile. We firstly determined the orbital parameters of FG Sct using the O - C method and obtained photometric solutions utilizing the updated W-D program. We also studied its period variation and discovered that its orbital period is decreasing at a rate of 6.39(+/- 0.24) x 10(-8) d yr(-1). which was likely caused by mass transfer from the primary component to the secondary component or angular momentum interchange between the two components via magnetic interactions. For VZ Lib and VZ Psc, we simultaneously analyzed their BV RI light curves in conjunction with the published radial velocities. In order to obtain the orbital parameters of VZ Lib, we also analyzed its period variation and revised cyclic change, which could be attributed to either the light-time effect due to a tertiary companion or magnetic activity cycle mechanism. We derived the periods of the tertiary component of VZ Lib to be 48.7(+/- 0.1) yr or magnetic cycle to be 46.9(+/- 1.9) yr. Strong emission lines at Ca II H+K, H alpha, H beta, H gamma and Ca II IRT were detected in the LAMOST spectra of VZ Psc, which imply chromospheric activities in this binary system.
资助项目	NSFC[U1631236] ; NSFC[U1431114] ; CAS[U1631236] ; CAS[U1431114] ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
WOS关键词	RS CANUM-VENATICORUM ; COLOR LIGHT CURVES ; MAGNETIC ACTIVITY ; RADIAL-VELOCITY ; PHYSICAL PARAMETERS ; CONTACT BINARIES ; COMAE BERENICES ; STAR LIGHT ; SKY SURVEY ; SYSTEM
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000475427200008
资助机构	NSFC ; NSFC ; CAS ; CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; NSFC ; NSFC ; CAS ; CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; NSFC ; NSFC ; CAS ; CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; NSFC ; NSFC ; CAS ; CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27014]
专题	中国科学院国家天文台
通讯作者	Zhang, Li-Yun
作者单位	1.Guizhou Univ, Dept Phys & Astron, Coll Phys, Guiyang 550025, Guizhou, Peoples R China 2.Guizhou Univ, Guizhou Prov Key Lab Publ Big Data, Guiyang 550025, Guizhou, Peoples R China 3.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100101, Peoples R China 4.Butler Univ, Dept Phys & Astron, Indianapolis, IN 46208 USA 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Yuc, Qiang,Zhang, Li-Yun,Han, Xian-Ming L.,et al. Orbital parameters and period variation studies of the short-period eclipsing binaries FG Sct, VZ Lib and VZ Psc[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(7):20.
APA	Yuc, Qiang,Zhang, Li-Yun,Han, Xian-Ming L.,Lu, Hong-Peng,Long, Liu,&Yan, Yan.(2019).Orbital parameters and period variation studies of the short-period eclipsing binaries FG Sct, VZ Lib and VZ Psc.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(7),20.
MLA	Yuc, Qiang,et al."Orbital parameters and period variation studies of the short-period eclipsing binaries FG Sct, VZ Lib and VZ Psc".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.7(2019):20.