Joint Astrophysical Colloquium
Digging into dwarf galaxies
Asa Skuladottir (Università di Firenze)
Thursday 02/11/2023 @ 11:30, Sala Antonio Sollima (IV piano Battiferro) + remoto
The Milky Way is an environment rich with satellite galaxies, stellar streams and accreted systems. Encoded in these structures is the formation and evolution of the Galaxy through cosmic time. Fortunately, these nearby relics can be studied in extraordinary detail – star by star – revealing the properties of the first stars, the build-up of chemical elements in the Universe, the nature of dark matter, and hierarchical galaxy formation. Here, I will talk about some recent insights from these Milky Way satellite galaxies, including a discovery of the most metal-poor star found in any external galaxy. Finally I will introduce my upcoming survey 4DWARFS: A 4MOST survey of dwarf galaxies and their stellar streams. 4DWARFS is a 5 year survey which will increase the number of stars with detailed abundance information in dwarf galaxies and stellar streams by several orders of magnitude.