The interplay between galaxy formation and cosmology

Speaker : Joop Schaye

Abstract :

Observational surveys of the distribution of matter in the universe are
becoming ever more precise and continue to be extended to smaller
scales. This necessitates accounting for the fact that baryons do not
precisely trace the dark matter. The redistribution of baryons by galactic
winds, which is the major bottleneck in our understanding of galaxy
evolution, therefore requires a convergence between models of large-scale
structure and cosmology. I will present results from the FLAMINGO suite of
large-volume cosmological, hydrodynamical simulations, which provide
insight into the importance of baryonic effects for cosmology using large-
scale structure and galaxy clusters. I will show that recent observations
suggest that ejection of gas by feedback processes is surprisingly effective.
Finally, I will present a preview of the COLIBRE simulations of galaxy
formation, a new suite of cosmological hydrodynamical simulations that
removes important shortcomings of previous simulations such as EAGLE.