publication . Article . 2018

Simulating the effect of high column density absorbers on the one-dimensional Lyman α forest flux power spectrum

Rogers, K. K.; Bird, S.; Peiris, H. V.; Pontzen, A.; Font-Ribera, A.; Leistedt, B.;
Open Access English
  • Published: 01 Mar 2018
  • Country: United Kingdom
Abstract
We measure the effect of high column density absorbing systems of neutral hydrogen (H I) on the one-dimensional (1D) Lyman α forest flux power spectrum using cosmological hydrodynamical simulations from the Illustris project. High column density absorbers (which we define to be those with HI column densities N(H I) > 1.6 × 10 17 atoms cm -2 ) cause broadened absorption lines with characteristic damping wings. These damping wings bias the 1D Lyman α forest flux power spectrum by causing absorption in quasar spectra away from the location of the absorber itself. We investigate the effect of high column density absorbers on the Lyman α forest using hydrodynamical s...
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: large-scale structure of universe, cosmology: theory
Funded by
RCUK| Precision cosmology at high redshift with the Lyman-alpha forest
Project
  • Funder: Research Council UK (RCUK)
  • Project Code: ST/N003853/1
  • Funding stream: STFC
,
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
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Article . 2018
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