抄録
The spectrum of a close binary star is a composite of the spectra of both the primary and secondary stars. Furthermore, high stellar rotational velocities lead to the blending of absorption lines, which complicates the accurate measurement of equivalent widths. In this study, we focused on the SB2 spectroscopic binary HIP 103833, for which the atmospheric parameters (effective temperature, surface gravity) and stellar parameters (mass, radius, luminosity) are already established. Utilizing spectral data obtained from the Nayuta Telescope at Nishi-Harima Observatory and MALLS, we derived atmospheric parameters and metallicities based on the equivalent widths of iron absorption lines. The parameters obtained in this research closely align with those from previous studies, thereby supporting the reliability of our equivalent width measurements. Additionally, the stellar parameters derived from our atmospheric analysis are not expected to differ significantly from those obtained from orbital motions in previous studies.
