Globular clusters and their contribution to the formation of the Galactic halo

TL;DR

This paper reviews recent evidence suggesting that globular clusters, through their multiple stellar populations, have significantly contributed to the formation of the Galactic halo, addressing key questions about their link and impact.

Contribution

It introduces new insights from chemical analyses of globular clusters' multiple populations to evaluate their role in building the Galactic halo.

Findings

Globular clusters have contributed to the halo's stellar population.

Chemical signatures support a link between GCs and halo stars.

The contribution of GCs to the halo is significant but not exclusive.

Abstract

This is a "biased" review because I will show recent evidence on the contribution of globular clusters (GCs) to the halo of our Galaxy seen through the lens of the new paradigm of multiple populations in GCs. I will show a few examples where the chemistry of multiple populations helps to answer hot questions including whether and how much GCs did contribute to the halo population, if we have evidence of the GCs-halo link, what are the strengths and weak points concerning this contribution.