A. Nusser
Statistics of neutral regions during hydrogen reionization
Nusser, A.; Benson, A.J.; Sugiyama, N.; Lacey, C.
Abstract
We present predictions for two statistical measures of the hydrogen reionization process at high redshift. The first statistic is the number of neutral segments identified in spectra of high-redshift QSOs as a function of their length. The second is the cross-correlation of neutral regions with possible sources of ionizing radiation. These independent probes are sensitive to the topology of the ionized regions. If reionization proceeded from high- to low-density regions, then the cross-correlation will be negative, while if voids were ionized first we expect a positive correlation and a relatively small number of long neutral segments. We test the sensitivity of these statistics for reionization by stars in high-redshift galaxies. The flux of ionizing radiation emitted from stars is estimated by identifying galaxies in an N-body simulation using a semianalytic galaxy formation model. The spatial distribution of ionized gas is traced in various models for the propagation of the ionization fronts. A model with ionization proceeding from high- to low-density regions is consistent with the observations of Becker et al., while models in which ionization begins in the lowest density regions appear to be inconsistent with the present data. Further data are required to confirm this result.
Citation
Nusser, A., Benson, A., Sugiyama, N., & Lacey, C. (2002). Statistics of neutral regions during hydrogen reionization. Astrophysical Journal Letters, 580(2), L93-L96. https://doi.org/10.1086/345655
Journal Article Type | Article |
---|---|
Publication Date | Dec 1, 2002 |
Deposit Date | Feb 11, 2015 |
Publicly Available Date | Feb 12, 2015 |
Journal | Astrophysical Journal Letters |
Print ISSN | 2041-8205 |
Electronic ISSN | 2041-8213 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 580 |
Issue | 2 |
Pages | L93-L96 |
DOI | https://doi.org/10.1086/345655 |
Keywords | Cosmology: observations, Cosmology: theory, Dark matter, Intergalactic medium, Large-scale structure of universe, Quasars: absorption lines. |
Public URL | https://durham-repository.worktribe.com/output/1614280 |
Files
Published Journal Article
(83 Kb)
PDF
Copyright Statement
© 2002. The American Astronomical Society. All rights reserved.
You might also like
FLAMINGO: calibrating large cosmological hydrodynamical simulations with machine learning.
(2023)
Journal Article
The complex interplay of AGN jet-inflated bubbles and the intracluster medium
(2023)
Journal Article
Active galactic nuclei jets simulated with smoothed particle hydrodynamics
(2023)
Journal Article
QWIND3: UV line-driven accretion disc wind models for AGN feedback
(2022)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.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