Spectroscopi̇c and photometri̇c research of some ecli̇psi̇ng bi̇nary systems i̇n open clusters

In this thesis, the spectroscopic and photometric analysis of some eclipsing binaries which belong to the northern open clusters have been investigated. The photometric studies have been done for some binaries in NGC 6913. Any eclipse has been observed from our sample which are announced as spectroscopic binary stars in the literature. The spectra of the eclipsing binaries, V765 Cas and V685 Mon, were tried to obtain but no radial velocity curves were created because of the limited data during this study. The BVRI photoemetric observations of the eclipsing binary V2659 Oph, which is located in the region of open cluster Melotte 186, has been done and light curves of the system are obtained. We derived, M1 = 1.827 M⊙, M2 = 0.642 M⊙, R1 = 1.657 R⊙, R2 = 0.633 R⊙, log L1 = 12.07 L⊙, log L2 = 0.18 L⊙ for the components. Also, the efferctive temperatures of the components are derived as Teff,1 = 8375 K, Teff,2 = 4743 ± 40 K. The distance of the system is determined as d = 1168 pc. Cluster membership of the system was discussed. The spactra of an other eclipsing binary system BD+36◦3317 which is a member of open cluster Stephenson 1 were obtained and the radial velocity curves have been created. By analysis of obtained radial velocity curves and the UBV light curves from the literature simultaneously, the absolute parameters of the components were obtained. So, we derived M1 = 2.24 ± 0.07 M⊙, M2 = 1.52±0.03 M⊙, R1 = 1.76±0.01 R⊙, R2 = 1.46±0.01 R⊙, log L1 = 1.52±0.08 L⊙, log L2 = 0.81 ± 0.07 L⊙ for the components of BD+36 3317. Also the temperature of the components are derived as Teff,1 = 10450 ± 420 K, Teff,2 = 7623 ± 328 K. The average distance of the system is obtained as d = 330 ± 29 pc. With the obtained results, the cluster membership probability of the system and the parameters of cluster are discussed.