Characterisation of the Galactic thick disk

TL;DR

This review summarizes recent high-resolution spectroscopic studies of the Milky Way's thick disk, discussing its properties, formation history, and relation to other stellar populations to inform galaxy formation models.

Contribution

It compiles and analyzes recent observational data to characterize the Galactic thick disk and its role in galaxy evolution.

Findings

Thick disk is common in spiral galaxies.

Properties of the thick disk constrain galaxy formation models.

Recent spectroscopic data reveal detailed chemical and kinematic characteristics.

Abstract

Thick disks appear to be common in external large spiral galaxies and our own Milky Way also hosts one. The existence of a thick disk is possibly directly linked to the formation history of the host galaxy and if its properties is known it can constrain models of galaxy formation and help us to better understand galaxy formation and evolution. This brief review attempts to highlight some of the characteristics of the Galactic thick disk and how it relates to other stellar populations such as the thin disk and the Galactic bulge. Focus has been put on results from high-resolution spectroscopic data obtained during the last 10 to 15 years.