Disentangling multiple stellar populations in globular clusters using the Str\"omgren system

TL;DR

This study uses the Strömgren photometric system to identify and analyze multiple stellar populations in globular clusters, revealing their presence, distribution, and characteristics.

Contribution

First application of Strömgren photometry to detect multiple populations in a broad sample of Galactic globular clusters.

Findings

Detection of multiple stellar populations in several clusters

Insights into the radial distribution of different populations

Establishment of the effectiveness of Strömgren system for this purpose

Abstract

An increasing amount of spectroscopic and photometric evidence is showing that the stellar populations of globular clusters are not as simple as they have been considered for many years. The presence of at least two different populations of stars is being discovered in a growing number of globular clusters, both in our Galaxy and in others. We have started a series of observations of Galactic globular clusters using the Str\"omgren photometric system in order to find the signatures of these multiple populations and establish their presence in a more complete sample of globular clusters in the Milky Way, and to study their radial distributions and extensions. We present here the first results of our survey.