تفاصيل الرسالة العلمية

In this study, Al-Wardat?s complex method for analyzing CVBSs was used to estimate the physical parameters and the Tokovinin's dynamical method was used to estimate the geometrical parameters of the CVBS Hip 43766. We used parallax measurements given by Hipparcos 1997, reduced Hipparcos 2007, and Gaia DR2 2018 to calculate the parameters in both methods. There is a very good consistency between observed and synthetic photometry obtained using Al-Wardat?s method. The calculated dynamical mass sum of the system ranged between 1.691 and 2.609 solar masses, while it ranges between 2.0 and 2.1 as estimated using Al-Wardat?s Method. This could be due to the inaccuracy in orbit, which can be modified with future observations for more relative positional measurements. The parameters of the system and the position of the components on the evolutionary tracks show that the system consists of F5 and G5 sub-giant stars, mostly formed by fragmentation