Speaker: Sebastian Trujillo Gomez (Heidelberg U.)
Title: 
Stars and globular clusters as tracers of galaxy formation and evolution, and the nature of dark matter
Abstract: 
In this talk I will discuss how stars and globular clusters (GCs) allow us to trace the assembly of galaxies and their dark matter (DM) haloes, and how these constrain the complex physics of galaxy formation. I will use examples from three studies: In the first, I will describe how studying the phase-space distribution of the MW GCs using Gaia and the E-MOSAICS simulations provides a detailed quantitative picture of the formation of our galaxy. In the second example, I will show how the unusual GC populations in galaxies like the infamous NGC1052-DF2 and DF4 can provide a snapshot of their galactic progenitors at cosmic noon. For
these objects, a simple model of star cluster formation points to an extremely dense birth environment and strong structural evolution, providing clues of the effect of clustered star formation on galaxy evolution. I will conclude with a follow-up study of the impact of clustered star formation on galaxy structure that provides clues about the origin of ultra-diffuse galaxies (UDGs), which are difficult to explain in the current paradigm of galaxy formation. I will show how anchoring an analytical model on galaxy scaling relations and numerical simulations predicts the emergence of UDGs that lack DM driven by clustered feedback from young GCs.