Kamran Ali
Cosmological constraints from Fourier phase statistics
Ali, Kamran; Obreschkow, Danail; Howlett, Cullan; Bonvin, Camille; Llinares, Claudio; Oliveira Franco, Felipe; Power, Chris
Authors
Danail Obreschkow
Cullan Howlett
Camille Bonvin
Claudio Llinares
Felipe Oliveira Franco
Chris Power
Abstract
Most statistical inference from cosmic large-scale structure relies on two-point statistics, i.e. on the galaxy–galaxy correlation function (2PCF) or the power spectrum. These statistics capture the full information encoded in the Fourier amplitudes of the galaxy density field but do not describe the Fourier phases of the field. Here, we quantify the information contained in the line correlation function (LCF), a three-point Fourier phase correlation function. Using cosmological simulations, we estimate the Fisher information (at redshift z = 0) of the 2PCF, LCF, and their combination, regarding the cosmological parameters of the standard CDM model, as well as a warm dark matter model and the f(R) and Symmetron-modified gravity models. The galaxy bias is accounted for at the level of a linear bias. The relative information of the 2PCF and the LCF depends on the survey volume, sampling density (shot noise), and the bias uncertainty. For a volume of 1 h −3 Gpc3, sampled with points of mean density ¯n = 2 × 10−3 h3 Mpc−3, and a bias uncertainty of 13 per cent, the LCF improves the parameter constraints by about 20 per cent in theCDMcosmology and potentially even more in alternative models. Finally, since a linear bias only affects the Fourier amplitudes (2PCF), but not the phases (LCF), the combination of the 2PCF and the LCF can be used to break the degeneracy between the linear bias and σ8, present in two-point statistics.
Citation
Ali, K., Obreschkow, D., Howlett, C., Bonvin, C., Llinares, C., Oliveira Franco, F., & Power, C. (2018). Cosmological constraints from Fourier phase statistics. Monthly Notices of the Royal Astronomical Society, 479(2), 2743-2753. https://doi.org/10.1093/mnras/sty1696
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 25, 2018 |
Online Publication Date | Jun 28, 2018 |
Publication Date | Jun 28, 2018 |
Deposit Date | Aug 30, 2018 |
Publicly Available Date | Mar 28, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 479 |
Issue | 2 |
Pages | 2743-2753 |
DOI | https://doi.org/10.1093/mnras/sty1696 |
Files
Published Journal Article
(814 Kb)
PDF
Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
You might also like
Effects of chaos on the detectability of stellar streams
(2019)
Journal Article
Detecting Coupled Domain Walls in Laboratory Experiments
(2019)
Journal Article
Cosmic Tsunamis in Modified Gravity: Disruption of Screening Mechanisms from Scalar Waves
(2017)
Journal Article
Modeling void abundance in modified gravity
(2017)
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