首页|Periodic Variation Studies of the Two Short Period W UMa-type Eclipsing Binaries:LX Lyn and V0853 Aur

Periodic Variation Studies of the Two Short Period W UMa-type Eclipsing Binaries:LX Lyn and V0853 Aur

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In this paper,new light curves(LCs)of contact eclipsing binary(CEB)systems LX Lyn and V0853 Aur are presented and analyzed by using the 2015 version of the Wilson-Devinney(W-D)code.In order to explain their asymmetric LCs,cool starspots on the components were employed.It is suggested that their fill-out degrees are f=12.0％(LX Lyn)andf=26.3％(V0853 Aur).At the same time,we found that LX Lyn is a W-type eclipsing binary(EB)with an orbital inclination of i=84°.88 and a mass ratio of q—2.31.V0853 Aur is also a W-type CEB with a mass ratio of q=2.77 and an orbital inclination of i=79°.26.Based on all available times of light minimum,their orbital period changes are studied by using the O-C method.The O-C diagram of LX Lyn reveals a cyclic oscillation with a period of about 14.84 yr and an amplitude of 0.0019 days,which can be explained by the light-travel time effect(LTTE)due to the presence of a third body with a minimum mass of 0.06M⊙.For V0853 Aur,it is discovered that the O-C diagram of the system also shows a cyclic oscillation with a period of 9.64 yr and an amplitude of 0.03365 days.The cyclic oscillation of V0853 Aur can be attributed to the LTTE by means of a third body with a mass no less than 3.77M⊙.The third body may play an important role in the formation and evolution of these systems.

stars:activity(stars:)binaries(including multiple):close(stars:)binaries:eclipsing(stars:)brown dwarfsstars:evolutionstars:formation

Xu Zhang、Bin Zhang

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School of Physics and Electronic Science,Guizhou Normal University,Guiyang 550001,China

Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing,Guizhou Normal University,Guiyang 550025,China

Joint Research Fund in Astronomy under cooperative agreement between the National Natural Science Foundation of China(NSFC)Joint Research Fund in Astronomy under cooperative agreement between the National Natural Science Foundation of China(NSFC)Chinese Academy of Sciences(CAS)国家自然科学基金贵州省科技计划贵州省科技计划Foundation of Education Bureau of Guizhou Province,ChinaOpen Project Program of the CAS Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of STESS team

U19311014236400111933008[2020]1Y017ZK[2022]322KY2020003

2024

10.1088/1674-4527/ad1367

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(1)
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