GC intrinsic iron abund. spreads. II. Milky Way

We use the Bailin (2018ApJ...863...99B) self-enrichment model to predict the relationship between properties of the protocluster-its mass and the metallicity of the protocluster gas cloud-and the final observable properties today-its current metallicity and the internal iron abundance spread.

We apply this model to an updated catalog of Milky Way GCs where the initial mass and/or the iron abundance spread is known to reconstruct their initial metallicities. We find that with the exception of the known anomalous bulge cluster Terzan 5 and three clusters strongly suspected to be nuclear star clusters from stripped dwarf galaxies, the model provides a good lens for understanding their iron spreads and initial metallicities.