Using cosmological simulations and synthetic absorption spectra to assess the accuracy of observationally derived CGM metallicities

We used adaptive mesh refinement hydrodynamic cosmological simulations of a z = 1 Milky Way-type galaxy and a z = 0 Dwarf galaxy and generated synthetic quasar absorption-line spectra of their circumgalactic medium (CGM). Our goal is to assess whether standard observational spectroscopic analysis methods accurately reproduce intrinsic column densities, metallicities [Si/H], and hydrogen densities ...