Bradley Greig
The impact of temperature fluctuations on the large-scale clustering of the Lyα forest
Greig, Bradley; Bolton, James S.; Wyithe, J. Stuart B.
Abstract
We develop a semi-analytic method for assessing the impact of the large-scale IGM temperature fluctuations expected following He ii reionization on three-dimensional clustering measurements of the Lyα forest. Our methodology builds upon the existing large volume, mock Lyα forest survey simulations presented by Greig et al. by including a prescription for a spatially inhomogeneous ionizing background, temperature fluctuations induced by patchy He ii photoheating and the clustering of quasars. This approach enables us to achieve a dynamic range within our semi-analytic model substantially larger than currently feasible with computationally expensive, fully numerical simulations. The results agree well with existing numerical simulations, with large-scale temperature fluctuations introducing a scale-dependent increase in the spherically averaged 3D Lyα forest power spectrum of up to 20–30 per cent at wavenumbers k ∼ 0.02 Mpc− 1. Although these large-scale thermal fluctuations will not substantially impact upon the recovery of the baryon acoustic oscillation scale from existing and forthcoming dark energy spectroscopic surveys, any complete forward modelling of the broad-band term in the Lyα correlation function will none the less require their inclusion.
Citation
Greig, B., Bolton, J. S., & Wyithe, J. S. B. (2015). The impact of temperature fluctuations on the large-scale clustering of the Lyα forest. Monthly Notices of the Royal Astronomical Society, 447(3), 2503-2511. https://doi.org/10.1093/mnras/stu2624
Journal Article Type | Article |
---|---|
Acceptance Date | Dec 9, 2014 |
Online Publication Date | Jan 9, 2015 |
Publication Date | Mar 1, 2015 |
Deposit Date | May 4, 2017 |
Publicly Available Date | May 4, 2017 |
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 | 447 |
Issue | 3 |
Pages | 2503-2511 |
DOI | https://doi.org/10.1093/mnras/stu2624 |
Keywords | intergalactic medium, quasars: absorption lines, cosmology: theory, large-scale structure of Universe |
Public URL | https://nottingham-repository.worktribe.com/output/743501 |
Publisher URL | https://academic.oup.com/mnras/article/447/3/2503/2892859/The-impact-of-temperature-fluctuations-on-the |
Contract Date | May 4, 2017 |
Files
stu2624.pdf
(1.2 Mb)
PDF
Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf
You might also like
Particle initialization effects on Lyman- αforest statistics in cosmological SPH simulations
(2024)
Journal Article
Downloadable Citations
About Repository@Nottingham
Administrator e-mail: discovery-access-systems@nottingham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search