Galactic archaeology in the Gaia Era: a surprising population of extremely metal-poor stars in the Milky Way disc

Autores
Dr.
Federico Sestito
University of Victoria
Fecha y hora
31 Mayo 2023 - 10:00 Europe/London
Dirección

Aula

Idioma de la charla
Inglés
Idioma de la presentación
Inglés
Número en la serie
1
Descripción

 

The history of the Universe can be revealed in the light of the stars, in particular in the oldest and the most pristine, also called metal-poor stars. From the chemical composition of these stars, it is possible to unveil the fossil fingerprint left from the previous generations of stars and open a window on the early Universe and the origins of the elements. Moreover, the kinematical properties of the most metal-poor stars are informative on the assembly of the Milky Way and the first structures in the Universe.
 In this seminar, I will focus on why/where to/how to investigate the most metal-poor stars. In particular, I will discuss some of the major achievements of one of the most efficient survey that hunts for these old stars, the Pristine survey. Then, I will focus on a particular population of very metal-poor stars that surprisingly inhabits the Milky Way plane. I will discuss how this population is connected to the early formation and evolution of our Galaxy.

Código de acceso: 209097

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