%0 Generic %1 keating2016testing %A Keating, Laura C. %A Puchwein, Ewald %A Haehnelt, Martin G. %A Bird, Simeon %A Bolton, James S. %D 2016 %K absorber feedback high-z line metal simulation %T Testing the effect of galactic feedback on the IGM at z ~ 6 with metal-line absorbers %U http://arxiv.org/abs/1603.03332 %X 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 IGM 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.

@misc{keating2016testing, 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 IGM 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.}, added-at = {2016-03-11T07:27:52.000+0100}, author = {Keating, Laura C. and Puchwein, Ewald and Haehnelt, Martin G. and Bird, Simeon and Bolton, James S.}, biburl = {https://www.bibsonomy.org/bibtex/26e69aceade9f759bb08a3a5a7244cd07/miki}, description = {[1603.03332] Testing the effect of galactic feedback on the IGM at z ~ 6 with metal-line absorbers}, interhash = {625e29d6b13a3ede237615c3907e9271}, intrahash = {6e69aceade9f759bb08a3a5a7244cd07}, keywords = {absorber feedback high-z line metal simulation}, note = {cite arxiv:1603.03332Comment: 23 pages, 21 figures and 5 tables}, timestamp = {2016-03-11T07:27:52.000+0100}, title = {Testing the effect of galactic feedback on the IGM at z ~ 6 with metal-line absorbers}, url = {http://arxiv.org/abs/1603.03332}, year = 2016 }