Vol. 10 No. 1 (2021)

Stellar age revealed by chemical composition

Laura Magrini
INAF-Osservatorio Astrofisico di Arcetri
Giada Casali
Dipartimento di Fisica e Astronomia, Università degli Studi di Firenze
Published March 17, 2021
  • stellar ages,
  • chemical abundances,
  • galaxy,
  • star clusters
How to Cite
Magrini, L., & Casali, G. (2021). Stellar age revealed by chemical composition. Il Colle Di Galileo, 10(1), 25-29. https://doi.org/10.36253/cdg-12715


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.


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