Constraining globular cluster formation through studies of young massive clusters - II. A Single Stellar Population Young Massive Cluster in NGC 34

摘要

Currently there are two competing scenarios to explain the origin of thestellar population in globular clusters (GCs). The main difference between themis whether or not multiple events of star formation took place within GCs. Inthis paper we present the star formation history (SFH) of Cluster 1, a massiveyoung cluster in NGC 34 $(\sim10^7\mbox{ M}_\odot)$. We use DynBaS, a spectrumfitting algorithm, to retrieve the SFH and find that Cluster 1 is consistentwith a single stellar population of solar metallicity with an age of $100\pm30$Myr and a mass of $1.9\pm0.4\times10^7\mbox{ M}_\odot$. These results are inconflict with the expectations/predictions of the scenarios that invokeextended or multiple episodes within 30--100 Myr of the initial star-formationburst in young massive clusters.