Galactic Archaeology in the Gaia era: a surprising population of very metal-poor stars in the Milky Way disc

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• Federico Sestito (Hertfordshire)
• Friday 21 February 2025, 11:30-12:30
• Ryle Seminar Room, KICC + online.

If you have a question about this talk, please contact Sandro Tacchella.

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. I will discuss some of the major achievements of one of the most efficient surveys that hunts for these old stars, the Pristine survey. Then, I will focus on a particular population of very metal-poor stars that surprisingly inhabit the Milky Way plane. I will discuss how this population is connected to the early formation and evolution of our Galaxy.

This talk is part of the Galaxies Discussion Group series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
• Cosmology, Astrophysics and General Relativity
• Galaxies Discussion Group
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• Ryle Seminar Room, KICC + online

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