Looking for a link between Gas Content of Dwarf Galaxies and Properties of their Globular Cluster systems

TL;DR

This study investigates the relationship between gas content and globular cluster properties in dwarf galaxies, revealing that early-type dwarfs tend to have higher mean metallicities in their GCs compared to late-type dwarfs.

Contribution

It provides new spectroscopic data comparing globular cluster properties across different dwarf galaxy types and environments, linking gas content to cluster metallicities.

Findings

Early-type dwarfs have higher mean GC metallicities than late-type dwarfs.

Globular cluster properties vary with galaxy morphology and environment.

Spectroscopic data from 6m telescope observations support these correlations.

Abstract

Star clusters are fundamental building blocks of galaxies. Their formation is related to the density and pressure in progenitor molecular clouds and their environmental conditions. To understand better the dynamical processes driving star formation and chemical evolution, we compare ages, metallicities, and alpha-element abundance ratios of globular clusters in nearby dwarf galaxies of different luminosities and morphological types, and situated in different environments. The data are based on our 6m telescope medium-resolution spectroscopic observations. We find that a mean metallicity of GCs in a galaxy at a given age is higher for early-type dwarfs, than for late-type dwarf irregulars and spirals.