Spectroscopic monitoring of massive eclipsing binaries

M. JAQUE ARANCIBIA; M. E. VERAMENDI; R. H. BARBÁ; J. F. GONZÁLEZ; N. MORRELL; J. I. ARIAS; R. GAMEN

La Serena

Congreso; Segunda Reunión Binacional AAA-SOCHIAS; 2018

Asociación Argentina de Astronomía - Sociedad Chilena de Astronomía

Recent studies about the multiplicity in massive stars show that at least 70% of O-type stars are in binary or multiple systems. The determination of the absolute orbital and physical parameters of the stellar components in these systems is crucial for the comparison with theoretical evolutionary models of massive stars. However, only a small number of systems have masses and absolute radii determined with good precision. In order to increase the number of binary systems with reliable parameters, we have started a spectroscopic follow-up of a sample of OB eclipsing binaries. The main goal is the determination of absolute parameters for the stellar components, combining simultaneous radial velocity and light curves analysis. In this work, we are presenting the status of the project and the preliminary analysis of two early-type binary systems.