The study of massive stars with 50 Msun initial mass at different evolutionary stages

TL;DR

This paper studies the evolution of massive stars with an initial mass of 50 solar masses at various stages, analyzing their physical and chemical changes to test current stellar evolution theories.

Contribution

It provides a comparative analysis of different evolutionary stages of massive stars with similar initial mass, offering insights into their physical and chemical evolution.

Findings

Tracking changes in physical parameters across stellar stages

Testing current theories of massive star evolution

Identifying chemical abundance variations

Abstract

We will present results of studies of several massive stars at different evolutionary stages, but with similar values of the initial mass: O-supergiants belonging to association Cyg OB2, unique LBV/post-LBV - Romano's star and two Wolf-Rayet stars - WR156 and FSZ35. All these stars have similar initial mass of about 50 Msun. It allows us to consider them a single star at different moments of life, and it gives an opportunity to track changes in the physical parameters (such as effective temperature, luminosity, mass loss rate, wind velocity) and chemical abundances during the life of a massive star. It is important to test the current evolution theories of such objects.