The Galactic thin and thick discs in the context of galaxy formation

TL;DR

This study analyzes 899 nearby F and G dwarf stars using high-resolution spectra to understand the origins of the Galaxy's thin and thick discs through elemental abundances, ages, and kinematics.

Contribution

It provides a detailed multi-dimensional analysis of stellar properties to trace the formation and evolution of the Galaxy's disc components.

Findings

Identification of distinct chemical signatures for thin and thick disc stars

Insights into the formation history of the Galactic discs

Methodology for defining thick disc stars based on elemental and kinematic data

Abstract

We have obtained high-resolution spectra and carried out a detailed elemental abundance analysis for a new sample of 899 F and G dwarf stars in the Solar neighbourhood. The results allow us to, in a multi-dimensional space consisting of stellar ages, detailed elemental abundances, and full kinematic information for the stars, study and trace their respective origins. Here we briefly address selection criteria and discuss how to define a thick disc star. The results are discussed in the context of galaxy formation.