The first light curve analysis of twin binary system V1175 Cas using ground-based and TESS data

Abstract

Eclipsing binary systems hold a central position within astrophysics in that the fundamental parameters of stars can be determined by direct observations. The simultaneous analyses of high-quality space observations, combined with ground-based photometric data, have allowed more sensitive detection of fundamental stellar parameters by multicolor photometry. In the paper, the fundamental parameters of the component stars for the V1175 Cas binary system were sensitively obtained by a simultaneous analysis of the Transiting Exoplanet Survey Satellite (TESS) light curve, and new CCD observations in BVRI filters obtained with a 60 cm robotic telescope at the TÜBİTAK National Observatory. Following the analysis, the masses and radii of the primary and secondary binary components were determined as M1=1.64±0.04M⊙, M2=1.63±0.07M⊙, and R1=1.77±0.05R⊙, R2=1.77±0.25R⊙, respectively. Moreover, the distance of V1175 Cas was computed as 280±32 pc. The photometric analysis reveals that the components of the system are in a similar evolutionary state. The primary and secondary components exhibit nearly the same masses, while their radii are perfectly matched. Additionally, the ages of the components are also consistent within the statistical uncertainties. Consequently, the system’s overall age is assessed to be approximately 750±70 Myr.