Multiple Stellar Populations in Galactic GCs: Observational Evidence

TL;DR

This paper reviews observational evidence for multiple stellar populations in Galactic globular clusters, challenging the traditional view of these clusters hosting a single stellar population, as seen through color-magnitude diagram splits.

Contribution

It summarizes the current observational findings on multiple stellar populations in Galactic globular clusters, highlighting the challenge to the single-population paradigm.

Findings

Multiple populations observed in color-magnitude diagrams

Splits in evolutionary sequences indicate diverse stellar populations

Challenges the traditional single-population model

Abstract

An increasing number of photometric observations of multiple stellar populations in Galactic globular clusters is seriously challenging the paradigm of GCs hosting single, simple stellar populations. These multiple populations manifest themselves in a split of some evolutionary sequences of the cluster color-magnitude diagrams. In this paper we will summarize the observational scenario.