Havlen-Moffat #1, el cúmulo menos pensado

Abstract

The cluster Havlen-Moffat # 1 (HM1), in the constellation of Scorpius, owes its name to those who discovered it in 1977. They identified, spectroscopically, two Wolf-Rayet and two Of-type stars. HM1 is located in the fourth quadrant of the Milky Way where the absorption of the interstellar medium is significant. This work presents an analysis of the fundamental parameters of the cluster, calculated by spectroscopy and $UBVRI$ photometry of some of the brightest components whose data were obtained with the Swope and du Pont telescopes of Las Campanas, Chile. New OB-type stars were identified from these data and the possible presence of a supergiant M star was analyzed.