Séminaire/Seminar Galaxies |
| « Recent star formation episodes in the Galaxy: impact on its chemical properties and the evolution of its abundance gradient » |
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Nicolas Prantzos |
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I will present some results of our recent studies (Prantzos,
Abia, Chen+2023, Chen and Prantzos 2024 submitted) of the evolution of the Milky Way, using a semi-analytical model with parametrized radial migration. I will focus on the consequences of recent (last several Gyr) star formation episodes, as reported in recent observational works. We find significant impact of those episodes on several observables, like the local age-metallicity and [??/Fe] vs metallicity relations, as well as the local stellar metallicity distribution or the existence of young [??/Fe] -rich stars. Moreover, we show that the recently found "wiggly" behaviour of the disk abundance gradient with age can be interpreted in terms of such star formation or infall episodes. |
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jeudi 7 novembre 2024 - 11:30 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |