Age, metallicity and alpha-elements abundance in stellar population

TL;DR

This paper presents high-resolution stellar population models with variable alpha-element enhancements, demonstrating that integrated spectra can reliably determine [Mg/Fe], aiding studies of galactic and star cluster enrichment.

Contribution

The study introduces detailed high-resolution models with variable alpha-element enhancements and validates a method to derive [Mg/Fe] from integrated spectra.

Findings

Reliable [Mg/Fe] measurements from integrated spectra of globular clusters.

High-resolution models enable detailed chemical abundance analysis.

Method facilitates investigation of galaxy and star cluster enrichment processes.

Abstract

We built modelled spectra of stellar population at high resolution and with variable alpha-elements enhancements. Analysing spectra of Galactic globular clusters we show that it is possible to derive reliably and efficiently [Mg/Fe] using spectra integrated along the line-of-sight. These detailed measurements open perspectives for investigating the enrichment process on galaxies and star clusters.