CAN MASSIVE STARS FLY OUT OF OPEN CLUSTERS AND EVOLVE OUTSIDE THEM?

Abstract

It is traditionally believed that blue hypergiants such as LBV should be concentrated in young massive clusters, such as early OB-type stars. But according to the observations of Smith & Tombleson [5] they are often located far from the OB associations. We performed a numerical simulation how the LBVs can be ejected from the parent stellar cluster. As it was established the evolution in binary systems can lead to the ejection of LBV or pre-LBV stars.