Speckle-interferometric Study of Close Visual Binary System HIP 11253 (HD 14874) using Gaia (DR2 and EDR3)

Abstract

We present a comprehensive set of physical and geometrical parameters for each of the components of the close visual binary system Hip 11253 (HD14874). We present an analysis for the binary and multiple stellar systems with the aim to obtain a match between the overall observational spectral energy distribution of the system and the spectral synthesis created from model atmospheres. The epoch positions are used to determine the orbital parameters and the total mass. The parameters of both components are derived as: , , , , , , , . Our analysis shows that the spectral types of both are F9a and K3b . By combining the orbital solution with the parallax measurements of Gaia DR2 and EDR3, we estimate the individual masses using H-R diagram Ma=1.09M⨀ and Mb=0.59M⨀ for using Gaia DR2 parallax and Ma=1.10M⨀ and Mb=0.61M⨀ for using Gaia EDR3 parallax. Finally, the location of both system’s components on the stellar evolutionary tracks is presented.