@article { , title = {Testing the effect of galactic feedback on the IGM at z∼ 6 with metal-line absorbers}, abstract = {We present models of low- and high-ionization metal-line absorbers (O i, C ii, C iv and Mg ii) during the end of the reionization epoch, at z ∼ 6. Using four cosmological hydrodynamical simulations with different feedback schemes (including the Illustris and Sherwood simulations) and two different choices of hydro-solver, we investigate how the overall incidence rate and equivalent width distribution of metal-line absorbers varies with the galactic wind prescription. We find that the O i and C ii absorbers are reasonably insensitive to the feedback scheme. All models, however, struggle to reproduce the observations of C iv and Mg ii, which are probing down to lower overdensities than O i and C ii at z ∼ 6, suggesting that the metals in the simulations are not being transported out into the intergalactic medium efficiently enough. The situation is improved but not resolved if we choose a harder (but still reasonable) and/or (locally) increased UV background at z ∼ 6.}, doi = {10.1093/mnras/stw1306}, eissn = {1365-2966}, issn = {0035-8711}, issue = {1}, journal = {Monthly Notices of the Royal Astronomical Society}, pages = {606-626}, publicationstatus = {Published}, publisher = {Oxford University Press}, url = {https://nottingham-repository.worktribe.com/output/795018}, volume = {461}, keyword = {Galaxies High-redshift, Intergalactic medium, Quasars, Absorption lines, Reionization, First stars}, year = {2016}, author = {Keating, Laura C. and Puchwein, Ewald and Haehnelt, Martin G. and Bird, Simeon and Bolton, James S.} }