Parameters of the components of visually close binary systems: Hip 11352

Abstract

Model atmospheres of the components of the visually close binary system Hip 11352 were constructed using a grid of Kurucz's blanketed models. The entire observational spectral energy distribution of the system was used as a reference for the comparison with synthetic ones created from the model atmospheres. The parameters of the components of the system were derived as {T_eff^{a} =5650±50} K, {T_eff^{b} =5550±50} K, {log g_a=4.47±0.13}, {log g_b=4.49±0.13}, {R_a=0.92±0.03} R_⊙, {R_b=0.88±0.02} R_⊙, {M_a=0.93±0.05 M_⊙}, { M_b=0.89±0.05 M_⊙}, with a spectral type G7 for the primary and G9 for the secondary. The synthetic magnitudes and of both components were calculated using Johnson-Cousins, Strömgren, and Tycho photometrical systems. Finally the formation and evolution of the system was discussed.