[Cosmology seminar] Baryons and all that

Baryonic effects on the matter distribution are one of the main theoretical systematics in Weak Lensing (WL) analyses. Without an improved understanding of feedback, the constraining power of surveys such as Euclid and LSST will be significantly degraded. In this talk, I will present the baryonification framework, which is an efficient method to model feedback effects both theoretically and in numerical simulations. I will discuss two recent applications: one on constraining feedback with X-ray luminosity profiles and one on modelling the pdf of Fast Radio Bursts. In the last part of the talk, I will discuss our current work on using baryonification to generate correlated realisations of WL and baryonic probes, and discuss a future application, cluster cosmology from the Simons Observatory.