Stellar Parameters and Evolutionary Pathways of the Subgiant System HIP 72217

Abstract

Abstract: In this study, we applied Al-Wardat’s method for analyzing stellar systems and variable stars to investigate the subgiant system HIP 72217, through which accurate stellar parameters were obtained, including stellar masses, effective temperatures (T_eff), and system age. For the primary component, we determined a mass of M_A = 1.14 ± 0.15 M_⊙ and effective temperature of T_{eff, A} = 6125 ± 50 K, while for the secondary component, we obtained the values of M_B = 1.12 ± 0.14 M_⊙ and T_{eff, B} = 5950 ± 50 K. The system’s age was estimated to be 3.548 Gyr, which is consistent with the expected evolutionary stage of a subgiant binary system. The evolutionary timeline of HIP 72217 is clarified in this work, which also demonstrates the efficacy of Al-Wardat’s method in determining the parameters of individual components within stellar systems. These findings contribute to a better understanding of the physical mechanisms that control subgiant binary evolution and their role in stellar evolution.

Keywords: Binary stars, Al-Wardat’s method, Subgiant, Evolutionary tracks, Isochrones.