Speaker: Giovanni Aricò (ICS, UZH)
Title: Cosmology with baryons: modelling the cosmic matter distribution for Large-Scale Structure analyses
Abstract: 
The interplay between gravitational and hydrodynamical forces in shaping the structure of the Universe is complex and still largely unknown. Gravitational forces are dominant on large scales, however, on small scales the gas is perturbed by hydrodynamical forces, and several astrophysical processes take place. Galaxy formation triggers supernovae explosions and energy injection from accreting supermassive black holes, perturbing the mass distribution and reshaping the gravitational potential. In this talk, I will introduce a new framework to consistently model the spatial distribution and time evolution of dark matter, gas, and galaxies, in the Large Scale Structure of the universe. The core of the framework is given by large, high-resolution N-body simulations: in a post-processing phase, the particles are displaced to explore different cosmological and baryonic scenarios, by combining two state-of-the-art algorithms, the cosmology-rescaling and the baryon correction model. Finally, I use artificial neural networks to learn the connections between cosmological and astrophysical parameters and the relevant summary statistics of the cosmic matter field.