Stellar age revealed by chemical composition
- stellar ages,
- chemical abundances,
- star clusters
Copyright (c) 2021 Laura Magrini, Giada Casali
This work is licensed under a Creative Commons Attribution 4.0 International License.
High-resolution spectroscopic surveys provide an extraordinary dataset on the processes of the formation and evolution of our galaxy, in which the determination of the ages of individual stars plays a major role. We present here a method for measuring stellar ages based on the carbon/nitrogen abundance ratio in stellar atmospheres. We apply this relationship to the disc of the Milky Way, finding a clear age difference between the thin and thick discs of our galaxy.