V570 Per: Characterization of a Benchmark Eclipsing Binary

Abstract This study presents a comprehensive analysis of the detached binary system V570 Per through combined photometric, spectroscopic, and astrometric observations. By disentangling the composite spectra, precise fundamental parameters and detailed chemical abundances were determined for both stars. The primary component has a mass of 1.456 9 − 0.0100 + 0.0094 M ⊙ , a radius of 1.54 3 − 0.009 + 0.012 R ⊙ , an effective temperature of 655 6 − 26 + 64 K, and a metallicity of + 0.1 8 − 0.01 + 0.03 dex, while the secondary has a mass of 1.357 9 − 0.0089 + 0.0094 M ⊙ , a radius of 1.37 7 − 0.015 + 0.013 R ⊙ , an effective temperature of 646 8 − 21 + 32 K, and a metallicity of + 0.1 5 − 0.01 + 0.02 dex. The system is estimated to be 57 7 − 60 + 60 Myr old with a synchronized orbit. The available O − C data imply a minimum mass of 0.57 M ⊙ or 0.11 M ⊙ for the third body, corresponding to eccentric and circular orbits, respectively. MES