Testing the effect of galactic feedback on the IGM at z ∼ 6 with metal-line absorbers
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 c...
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| Format: | Article |
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Oxford University Press
2016
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| Online Access: | https://eprints.nottingham.ac.uk/37040/ |
| _version_ | 1848795379785531392 |
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| author | Keating, Laura C. Puchwein, Ewald Haehnelt, Martin G. Bird, Simeon Bolton, James S. |
| author_facet | Keating, Laura C. Puchwein, Ewald Haehnelt, Martin G. Bird, Simeon Bolton, James S. |
| author_sort | Keating, Laura C. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T19:31:09Z |
| format | Article |
| id | nottingham-37040 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:31:09Z |
| publishDate | 2016 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-370402020-05-04T17:56:32Z https://eprints.nottingham.ac.uk/37040/ 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. 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. Oxford University Press 2016-06-15 Article PeerReviewed Keating, Laura C., Puchwein, Ewald, Haehnelt, Martin G., Bird, Simeon and Bolton, James 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). pp. 606-626. ISSN 1365-2966 Galaxies High-redshift Intergalactic medium Quasars Absorption lines Reionization First stars http://mnras.oxfordjournals.org/content/461/1/606 doi:10.1093/mnras/stw1306 doi:10.1093/mnras/stw1306 |
| spellingShingle | Galaxies High-redshift Intergalactic medium Quasars Absorption lines Reionization First stars Keating, Laura C. Puchwein, Ewald Haehnelt, Martin G. Bird, Simeon Bolton, James S. Testing the effect of galactic feedback on the IGM at z ∼ 6 with metal-line absorbers |
| title | Testing the effect of galactic feedback on the IGM at z ∼ 6 with metal-line absorbers |
| title_full | Testing the effect of galactic feedback on the IGM at z ∼ 6 with metal-line absorbers |
| title_fullStr | Testing the effect of galactic feedback on the IGM at z ∼ 6 with metal-line absorbers |
| title_full_unstemmed | Testing the effect of galactic feedback on the IGM at z ∼ 6 with metal-line absorbers |
| title_short | Testing the effect of galactic feedback on the IGM at z ∼ 6 with metal-line absorbers |
| title_sort | testing the effect of galactic feedback on the igm at z ∼ 6 with metal-line absorbers |
| topic | Galaxies High-redshift Intergalactic medium Quasars Absorption lines Reionization First stars |
| url | https://eprints.nottingham.ac.uk/37040/ https://eprints.nottingham.ac.uk/37040/ https://eprints.nottingham.ac.uk/37040/ |