Hassan, SultanFinlator, KristianDave, Romeel2021-02-122021-02-122020Hassan, S. et al. (2020). Testing galaxy formation simulations with damped Lyman-α abundance and metallicity evolution. Monthly Notices of the Royal Astronomical Society, 492(2), 2835–28461365-2966https://doi.org/10.1093/mnras/staa056http://hdl.handle.net/10566/5907We examine the properties of damped Lyman-α absorbers (DLAs) emerging from a single set of cosmological initial conditions in two state-of-the-art cosmological hydrodynamic simulations: SIMBA and TECHNICOLOR DAWN. The former includes star formation and black hole feedback treatments that yield a good match with low-redshift galaxy properties, while the latter uses multifrequency radiative transfer to model an inhomogeneous ultraviolet background (UVB) self-consistently and is calibrated to match the Thomson scattering optical depth, UVB amplitude, and Ly α forest mean transmission at z > 5. Both simulations are in reasonable agreement with the measured stellar mass and star formation rate functions at z ≥ 3, and both reproduce the observed neutral hydrogen cosmological mass density, ΩHI(z)⁠.enGalaxies: evolutionGalaxies: formationIntergalactic mediumQuasars: absorption linesCosmology: theoryArticle