Young Massive Clusters/Associations in the GMC G23.3-0.3

TL;DR

This study presents a spectroscopic survey of massive stars in the G23.3-0.3 region, revealing numerous early-type stars, a new luminous blue variable, red supergiants, and potential progenitors of supernova remnants, enhancing understanding of stellar populations in this complex.

Contribution

It provides new spectroscopic data identifying massive stars and supernova progenitors in the G23.3-0.3 region, which was previously less characterized.

Findings

38 early-type stars identified

Discovery of a new luminous blue variable

Likely progenitors of several supernova remnants identified

Abstract

An overview of a spectroscopic survey for massive stars in the direction of the Galactic giant molecular complex G23.3-0.3 is presented (Messineo et al. 2010, and 2014 A&A submitted). This region is interesting because it is rich in HII regions and supernova remnants (SNRs). A number of 38 early-type stars, a new luminous blue variable, and a dozen of red supergiants were detected. We identified the likely progenitors of the SNRs W41, G22.7-00.2, and G22.7583-0.4917.