| Issue |
A&A
Volume 694, February 2025
|
|
|---|---|---|
| Article Number | A120 | |
| Number of page(s) | 16 | |
| Section | Galactic structure, stellar clusters and populations | |
| DOI | https://doi.org/10.1051/0004-6361/202452552 | |
| Published online | 06 February 2025 | |
Recent star formation episodes in the Galaxy: Impact on its chemical properties and the evolution of its abundance gradient
Institut d’Astrophysique de Paris, UMR7095 CNRS, Sorbonne Université,
98bis Bd. Arago,
75104
Paris,
France
★ Corresponding author; nikos.prantzos@iap.fr
Received:
9
October
2024
Accepted:
14
December
2024
Aims. We investigate the chemical evolution of the Milky Way disc exploring various schemes of recent (past several Gyr) star formation episodes, as reported in recent observational works.
Methods. We used a semi-analytical model with parametrized radial migration, and we introduced Gaussian star formation episodes constrained by the recent observations.
Results. We find significant impact from the star formation episodes on several observables, including the local age–metallicity and [α/Fe] versus metallicity relations, as well as the local stellar metallicity distribution and the existence of young [α/Fe] -rich stars. Moreover, we show that the recently found ‘wiggly’ behaviour of the disc abundance gradient with age can be interpreted in terms of either star formation or infall episodes.
Key words: Galaxy: abundances / Galaxy: disk / Galaxy: evolution
© The Authors 2025
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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