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

11 pages, 10 figures, submitted to MNRAS. arXiv admin note: text overlap with arXiv:2204.10680, arXiv:2209.12548

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