Speaker
Massimo Meneghetti
(INAF-OAS)
Description
Strong lensing mass reconstructions of several galaxy clusters obtained by combining imaging from HST and JWST and spectroscopy from MUSE show that cluster galaxies are much more compact than found in high-resolution hydrodynamical simulations. In this talk, I will discuss the possible origins of this discrepancy, whether it can be due to how galaxy formation is modeled in the simulations, to biases in the mass reconstructions, or to wrong assumptions about the nature of dark matter.
Primary author
Massimo Meneghetti
(INAF-OAS)
