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.
Description
[1603.03332] Testing the effect of galactic feedback on the IGM at z ~ 6 with metal-line absorbers
%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
}