Description
The age-metallicity relation (AMR) is a key observational tool for understanding the chemical evolution and formation of galactic discs over time. Using the Auriga cosmological simulations—a suite of high-resolution Milky Way-like galaxy models—we analyze the AMR across the full simulation suite. We have found anomalous AMR features in certain galaxies, which trace past dynamical events such as Active Galactic Nuclei (AGN) activity and bar formation. We divided the thin and thick discs into inner and outer regions to examine how these events differentially influence galactic structure, star formation history, and chemical evolution. Our results demonstrate the AMR’s unique ability to decode a galaxy’s evolutionary history, particularly in revealing how internal processes like bars and AGN shape disc galaxies.
