Laura C. Keating
Testing the effect of galactic feedback on the IGM at z∼ 6 with metal-line absorbers
Keating, Laura C.; Puchwein, Ewald; Haehnelt, Martin G.; Bird, Simeon; Bolton, James S.
Authors
Ewald Puchwein
Martin G. Haehnelt
Simeon Bird
JAMES BOLTON James.Bolton@nottingham.ac.uk
Professor of Astrophysics
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.
Citation
Keating, L. C., Puchwein, E., Haehnelt, M. G., Bird, S., & Bolton, J. S. (2016). Testing the effect of galactic feedback on the IGM at z∼ 6 with metal-line absorbers. Monthly Notices of the Royal Astronomical Society, 461(1), 606-626. https://doi.org/10.1093/mnras/stw1306
Journal Article Type | Article |
---|---|
Acceptance Date | May 27, 2016 |
Online Publication Date | Jun 15, 2016 |
Publication Date | Sep 1, 2016 |
Deposit Date | Sep 22, 2016 |
Publicly Available Date | Sep 22, 2016 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 461 |
Issue | 1 |
Pages | 606-626 |
DOI | https://doi.org/10.1093/mnras/stw1306 |
Keywords | Galaxies High-redshift, Intergalactic medium, Quasars, Absorption lines, Reionization, First stars |
Public URL | https://nottingham-repository.worktribe.com/output/795018 |
Publisher URL | http://mnras.oxfordjournals.org/content/461/1/606 |
Additional Information | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 the Royal Astronomical Society Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Contract Date | Sep 22, 2016 |
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Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf
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