Speaker
Description
Baryonic feedback processes significantly impact weak-lensing observations at small scales, introducing uncertainties and potential biases in cosmological parameter estimates. These challenges can be mitigated by combining weak-lensing data with complementary observations, such as X-ray and Sunyaev-Zeldovich (SZ) effect measurements. In this talk, I will introduce a new baryonification method that transforms gravity-only N-body simulations into individual density fields for dark matter, stars, and gas, alongside temperature and pressure fields. This versatile approach enables the joint analysis of cosmological observables either through power spectra and summary statistics or via simulation-based inference. By simultaneously constraining cosmological and baryonic feedback parameters, we will stress-test the LCDM model at small scales and learn more about the intergalactic medium on the way.
