Christopher T Davies
Constraining cosmology with weak lensing voids
Davies, Christopher T; Cautun, Marius; Giblin, Benjamin; Li, Baojiu; Harnois-Déraps, Joachim; Cai, Yan-Chuan
Authors
Marius Cautun
Benjamin Giblin
Professor Baojiu Li baojiu.li@durham.ac.uk
Professor
Joachim Harnois-Déraps
Yan-Chuan Cai
Abstract
Upcoming surveys such as LSST and EUCLID will significantly improve the power of weak lensing as a cosmological probe. To maximize the information that can be extracted from these surveys, it is important to explore novel statistics that complement standard weak lensing statistics such as the shear–shear correlation function and peak counts. In this work, we use a recently proposed weak lensing observable – weak lensing voids – to make parameter constraint forecasts for an LSST-like survey. We use the cosmo-SLICS wCDM simulation suite to measure void statistics as a function of cosmological parameters. The simulation data is used to train a Gaussian process regression emulator that we use to generate likelihood contours and provide parameter constraints from mock observations. We find that the void abundance is more constraining than the tangential shear profiles, though the combination of the two gives additional constraining power. We forecast that without tomographic decomposition, these void statistics can constrain the matter fluctuation amplitude, S8, within 0.3 per cent (68 per cent confidence interval), while offering 1.5, 1.5, and 2.7 per cent precision on the matter density parameter, Ωm, the reduced Hubble constant, h, and the dark energy equation of state parameter, w0, respectively. These results are tighter than the constraints from the shear–shear correlation function with the same observational specifications for Ωm, S8, and w0. The constraints from the weak lensing voids also have complementary parameter degeneracy directions to the shear 2PCF for all combinations of parameters that include h, making weak lensing void statistics a promising cosmological probe.
Citation
Davies, C. T., Cautun, M., Giblin, B., Li, B., Harnois-Déraps, J., & Cai, Y. (2021). Constraining cosmology with weak lensing voids. Monthly Notices of the Royal Astronomical Society, 507(2), 2267-2282. https://doi.org/10.1093/mnras/stab2251
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 29, 2021 |
Online Publication Date | Aug 5, 2021 |
Publication Date | 2021-10 |
Deposit Date | Oct 8, 2021 |
Publicly Available Date | Oct 8, 2021 |
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 | 507 |
Issue | 2 |
Pages | 2267-2282 |
DOI | https://doi.org/10.1093/mnras/stab2251 |
Files
Published Journal Article
(8 Mb)
PDF
Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2021 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
You might also like
Where shadows lie: reconstruction of anisotropies in the neutrino sky
(2023)
Journal Article
Machine learning and structure formation in modified gravity
(2023)
Journal Article
MGLENS: Modified gravity weak lensing simulations for emulation-based cosmological inference
(2023)
Journal Article
Upscaling ExaHyPE – on each and every core
(2023)
Report
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