The first photometric solution and period variation of BG Vul binary star

This study is focused on the photometric solution of stars of the G2V spectral type. Photometric solutions light curve analysis in V-band were applied to the sun-like star (BG Vul) located in the ASAS catalog. The light curve of BG Vul showed variation in W UMa (EW/KW) type. Absolute parameters very close to the astrophysical fundamental values of the sun were obtained as a result of the solution. Period variation of the sun-like BG Vul variable star selected from the solar analog star list of Tanriver (2012, 2013) was performed. We conducted an unspotted solution for the BG Vul binary system. The masses of the primary and secondary components for BG Vul were M₁ = 1.017 M_⊙ and M₂ = 0.895 M_⊙, respectively, while the radius for the primary was R₁ = 1.238 R_⊙, and R₂ = 1.176 R_⊙ for the secondary. The temperatures of the primary and secondary were T₁ = 5868 K and T₂ = 5520 K, respectively. We revealed that BG Vul is most likely a member of the A-type subclass of W UMa binaries.