"Latest Constrains on the Formation of Globular Clusters"

Currently there are two competing scenarios to explain the origin of the stellar populations in globular clusters (GCs). The main difference between them is whether or not multiple events of star formation took place within GCs. Some of these formation scenarios predict that young massive clusters (YMCs) should be spawning new generations of stars within them. Here we will present the constraints on several GCs formation scenarios gathered so far through optical and radio observations of YMCs.