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Cosmological hydrodynamical simulations of galaxy evolution are increasingly able to produce realistic galaxies, but the largest hurdle remaining is in constructing subgrid models that accurately describe the behavior of stellar feedback. As an alternate way to test and calibrate such models, we propose to focus on the circumgalactic medium. To do so, we generate a suite of adaptive-mesh refinement (AMR) simulations for a Milky-Way-massed galaxy run to z = 0, systematically varying the feedback im-plementation. We then post-process the simulation data to compute the absorbing column density for a wide range of common atomic absorbers throughout the galactic
Hummels et al. (Sat,) studied this question.