Topics on Galactic Chemical Evolution

TL;DR

This paper explores key issues in Galactic chemical evolution, including the absence of secondary element signatures, halo formation through hierarchical models, and the impact of radial migration on disk evolution.

Contribution

It provides a comprehensive discussion on three distinct topics, integrating observational data and recent theoretical developments in Galactic evolution.

Findings

No observational signature of secondary elements detected

Galactic halo likely formed via hierarchical galaxy formation

Radial migration significantly influences disk evolution

Abstract

I discuss three different topics in Galactic chemical evolution:the "puzzling" absence of any observational signature of secondary elements ; the building of the Galactic halo in the framework of hierarchical galaxy formation, as evidenced from its metallicity distribution ; and the potentially important role that radial migration may play in the evolution of galactic disks, according to recent studies.