Test of binary spectral model on FEROS spectra. First estimation of the fundamental parameters for HD 20784

TL;DR

This study applies a binary spectral model to high-resolution FEROS spectra of 26 early-type stars, confirming multiple SB2 candidates and estimating fundamental parameters for HD 20784, providing new insights into their properties.

Contribution

First application of a binary spectral model to FEROS spectra for early-type stars, including the initial fundamental parameters estimation for HD 20784.

Findings

Confirmed seven SB2 candidates.

Derived mass ratios and spectroscopic parameters.

Estimated fundamental parameters and age for HD 20784.

Abstract

We analyse spectra of 26 early-type stars, with suspected binarity, using a binary spectral model adapted for high-resolution FEROS spectra. We confirm seven SB2 candidates (AE Pic, $\epsilon$ Vol, HD 20784, HD 208433, HD 43519, HD 56024, CD-73~375A) and derive mass ratios and spectroscopic parameters for them. We find good agreement with theoretical models. For slightly evolved system HD 20784 we made the first estimation of the fundamental parameters and age $\log{t}=8.5$ yr.