Séminaire/Seminar Galaxies |
| « Tracing the accretion history of the Milky Way through its globular clusters » |
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Giulia Pagnini |
| Reconstructing how all the stellar components of the Galaxy formed and assembled over time, by studying the properties of the stars which make it, is the aim of Galactic archeology. Globular clusters play a fundamental role in this research field since they are among the oldest stellar systems in the Milky Way and so bear witness of its entire past. As a natural result of galaxy formation, globular clusters did not necessarily all formed in the Galaxy itself: a fraction of them can indeed have been formed in satellite galaxies accreted by the Milky Way over time. In the recent years, there have been several attempts to constrain the nature of clusters (accreted or formed in the Milky Way itself) through the analysis of kinematic spaces (such as energy-angular momentum and actions space) and to reconstruct from this the properties of the accretions events experienced by the Milky Way through time. In this talk, I will question this approach, and the accretion history of the Milky Way based on these methods, that has been suggested so far in the literature. I will suggest possible avenues - yet to be explored - for solving the puzzle of the accretion history of our Galaxy, as traced by its globular cluster system. |
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jeudi 9 mars 2023 - 11:30 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |