Rana Ezzeddine (University of Florida): Probing the lives (and deaths) of the oldest stars

Thursday 24 Mar 2022, 14:00 → 15:00 Europe/Stockholm

https://uu-se.zoom.us/j/62091586806

Title: Probing the lives (and deaths) of the oldest stars
Speaker: Rana Ezzeddine
Affiliation: University of Florida
Time: Thursday 24 March 2022, 1400 to 1500
Location: online at https://uu-se.zoom.us/j/62091586806 (Zoom meeting ID: 620 9158 6806)

Abstract:

The oldest, most metal-poor stars found in the Galactic halo and satellite dwarf galaxies retain in their atmospheres the chemical footprints of the high redshift Universe. Employing “stellar archaeology” – the diverse use of the chemical and dynamical properties of metal-poor stars – we can answer outstanding questions about the early Universe. Using high resolution optical and UV spectroscopic observations of the dataset of the most chemically interesting metal-poor stars, I use the most metal-poor Galactic stars to help elucidate the nature of their first star progenitors and mechanisms of the SNe responsible for their chemical signatures. I will also explore major recent advancements in our understanding of the heaviest elements formation in the metal-poor stars via the r(apid) neutron capture process, especially in light of the recent ground breaking gravitational wave discovery of the binary neutron star mergers event.