Speaker
Description
There is no consensus on how baryonic feedback shapes the non-linear matter power spectrum from hydrodynamical simulations. With improvements in survey size and methodology, this uncertainty is now a limiting systematic for cosmic shear inference at small scales. Modern simulations are tuned to reproduce a variety of galaxy observations, however, they still predict a wide range of feedback magnitudes, and constraints from weak lensing + kinematic Sunyaev-Zel’dovich (kSZ) effect favor an even stronger feedback scenario, and lower gas fractions. In this talk, we address uncertainties in the observational landscape with a multi-observation view of the same sample of galaxies. I present measurements for a the gas distribution, as seen by X-ray, kSZ and galaxy-galaxy lensing for the same sample of galaxies in bins of mass and redshift, in comparison to predictions from the FLAMINGO simulations.
