Binary system modelling: The determination of stellar physical quantities in a double-lined spectroscopic system

Abstract

Abstract The mass and size of a star are essential characteristics in astronomical measurement. This paper presents the investigation of two components of a binary system through the analysis of the BH Virginis system. The stellar masses and size can also be obtained by establishing a best-fit binary model with actual data and determining the corresponding stellar parameters using the Nightfall program. The results obtained for the primary star include mass (1.095±0.060 M⊙), mean radius (1.156±0.084 R⊙) and luminosity (1.462±0.11 L⊙). For secondary stars, the results obtained are mass (1.205±0.060 M⊙), mean radius (0.867±0.072 R⊙) and luminosity (0.940±0.08 L⊙). It demonstrates the basic properties of the binary system and gives a general idea of obtaining a relatively precise result based on an eclipsing spectroscopic method.