Thirteen facts that you need to know on multiple populations in globular clusters

TL;DR

This paper reviews recent photometric methods used to identify and analyze multiple stellar populations in globular clusters, summarizing key findings from recent surveys with Hubble and ground-based telescopes.

Contribution

It provides a comprehensive overview of the latest techniques and results in studying multiple populations in globular clusters, highlighting recent advances and main properties.

Findings

Multiple populations are common in globular clusters.

Photometric methods effectively distinguish different populations.

Recent surveys reveal detailed properties of these populations.

Abstract

I review the methods, mostly developed in the last decade, that are commonly used to identify and characterize multiple populations (MPs) in Globular Clusters based on photometry. I summarize the results from the recent surveys of MPs with the Hubble Space Telescope and ground-based facilities and provide a list of the main properties of MPs as inferred from these studies.