首页|BSN:Photometric Light Curve Analysis of Two Contact Binary Systems LS Del and V997 Cyg

BSN:Photometric Light Curve Analysis of Two Contact Binary Systems LS Del and V997 Cyg

扫码查看
原文链接
  • 万方数据
  • 维普
The light curve analyses and orbital period variations for two contact binary stars,LS Del and V997 Cyg,are presented in this work which was conducted in the frame of the Binary Systems of South and North project.Ground-based photometric observations were performed at two observatories in France.We used the Transiting Exoplanet Survey Satellite(TESS)data for extracting times of minima and light curve analysis of the target systems.The O-C diagram for both systems displays a parabolic trend.LS Del and V997 Cyg's orbital periods are increasing at rates of dP/dt=7.20× 10-08 daysyr-1 and dP/dt=2.54 × 10-08 days yr-1,respectively.Therefore,it can be concluded that mass is being transferred from the less massive star to the more massive component with a rate of dM/dt=-1.96 × 10-7M⊙ yr-1 for the LS Del system,and dM/dt=-3.83 × 10-7M⊙yr-1 for V997 Cyg.The parameters of a third possible object in the system are also considered.The PHysics Of Eclipsing BinariEs Python code was used to analyze the light curves.The light curve solutions needed a cold starspot due to the asymmetry in the LS Del system's light curve maxima.The mass ratio,fill-out factor,and star temperature all indicate that both systems are contact binary types in this investigation.Two methods were applied to estimate the absolute parameters of the systems:one method relied on the parallax of Gaia DR3,and the other used a P-M relationship.The positions of the systems are also depicted on the M-L,M-R,q-Lratio,and log Mtot-logJ0 diagrams.We recommend that further observations and investigations be done on the existence of a fourth body in this system.

(stars:)binaries:eclipsingmethods:observationalstars:individual(LS Del and V997 Cyg)

Atila Poro、Mehmet Tanriver、Elham Sarvari、Shayan Zavvarei、Hossein Azarara、Laurent Corp、Sabrina Baudart、Asma Ababafi、Nazanin Kahali Poor、Fariba Zare、Ahmet Bulut、Ahmet Keskin

展开 >

Astronomy Department of the Raderon AI Lab.,Burnaby,BC.,Canada

Department of Astronomy and Space Science,Faculty of Science,Erciyes University,Kayseri TR-38039,Türkiye

Erciyes University,Astronomy and Space Science Observatory Application and Research Center,Kayseri TR-38039,Türkiye

Independent Astrophysics Researcher,Tehran,Iran

Department of Physics,Shahid Beheshti University,Tehran,Iran

Faculty of Physics,Shahid Bahonar University of Kerman,P.O.Box76175,Kerman,Iran

Double Stars Committee,Société Astronomique de France,Paris,France

Dez Astronomical Association,Khouzestan Province,Dezful,Iran

Department of Physics,Amirkabir University of Technology,Tehran,Iran

Department of Physics,Faculty of Sciences,Çanakkale Onsekiz Mart University,Terzioğlu Kampüsü,TR-17020,Çanakkale,Türkiye

Astrophysics Research Center and Observatory,Çanakkale Onsekiz Mart University,Terzioğlu Kampüsü,TR-17020,Çanakkale,Türkiye

展开 >

Scientific Research Projects Coordination Unit of Erciyes UniversityNASA Explorer Program

FBA-2022-11737

2024

10.1088/1674-4527/ad30b2

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(4)