Study of stellar multiplicity in open clusters

ALEJO, A.; GONZÁLEZ, J. F.; VERAMENDI, M. E.; JAQUE, M.

La Serena

Congreso; Second binational meeting AAA-SOCHIAS; 2018

Sociedad Chilena de Astronomía

We present the first results of an observational project entitled "The stellar multiplicity in thedynamics of stellar clusters", that is aimed at the study of stellar multiplicity in poor open clustersdominated by one or a few massive central stars. The main goal is to determine the role of massivemultiple systems in the dynamical evolution and the eventual disintegration of the clusters. In thiswork we present the results of the spectroscopic observations carried out during the first semester of2018 in the Complejo Astronómico El Leoncito (CASLEO), where we obtained spectra of 155 starsbelonging to 15 stellar clusters. The target selection was made taking into account an astrometricstudy of membership previously made using the GAIA catalog. The spectroscopic observations areused to measure radial velocities and perform a variability study to detect binary or multiplesystems.