First Light Curve Analysis of NSVS 8294044,V1023 Her,and V1397 Her Contact Binary Systems  

作　　者：Atila Poro Sabrina Baudart Mahshid Nourmohammad Zahra Sabaghpour Arani Fatemeh Farhadi Selda Ranjbar Salehian Ahmad Sarostad Saeideh Ranjbaryan Iri Olya Maryam Hadizadeh AmirHossein Khodaei 

机构地区：[1]Astronomy Department of the Raderon AI Lab.,Burnaby,BC,Canada [2]Double Stars Committee,SociétéAstronomique de France,Paris,France [3]Independent Astrophysics Researcher,Isfahan,Iran [4]Akhtaran Astronomical Society,Isfahan Province,Aran and Bidgol,Iran [5]Department of Physics,Faculty of Science,Zanjan University,Zanjan,Iran [6]Astronomy Students'Scientific Association,University of Tabriz,East Azerbaijan Province,Tabriz,Iran [7]Yazd Desert Night Sky Astronomy Institute,Yazd Province,Yazd,Iran [8]Ayaz Astronomical Association,East Azerbaijan Province,Tabriz,Iran [9]Khayyam Astronomy Association,Fars,Fasa,Iran

出　　处：《Research in Astronomy and Astrophysics》2024年第5期1-12,共12页天文和天体物理学研究（英文版）

摘　　要：The first photometric light curve investigation of the NSVS 8294044,V1023 Her,and V1397 Her binary systems is presented.We used ground-based observations for the NSVS 8294044 system and Transiting Exoplanet Survey Satellite data for V1023 Her and V1397 Her.The primary and secondary times of minima were extracted from al the data,and,by collecting the literature,a new ephemeris was computed for each system.Linear fits for the O-C diagrams were conducted using the Markov Chain Monte Carlo (MCMC) method.Light curve solutions were performed using the PHysics Of Eclipsing BinariEs Python code and the MCMC approach.The systems were found to be contact binary stars based on the fillout factor and mass ratio.V1023 Her showed the O’Connell effect and a cold starspot on the secondary component was required for the light curve solution.The absolute parameters of the system were estimated based on an empirical relationship between orbital period and mass.We presented a new T–M equation based on a sample of 428 contact binary systems and found that our three target systems were in good agreement with the fit.The positions of the systems were also depicted on the M–L,M–R,q–L_(ratio),and M_(tot)–J_(0)diagrams in the logarithmic scales.

关 键 词：(stars:)binaries eclipsing-techniques photometric-stars individual(NSVS 8294044) 

分 类 号：P15[天文地球—天文学]