Issue |
A&A
Volume 674, June 2023
|
|
---|---|---|
Article Number | A150 | |
Number of page(s) | 11 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361/202245626 | |
Published online | 16 June 2023 |
Cosmology with cosmic web environments
II. Redshift-space auto and cross-power spectra
1
Laboratoire de Physique de l’École normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris Cité, 75005 Paris, France
e-mail: tony.bonnaire@ens.fr
2
Université Paris-Saclay, CNRS, Institut d’Astrophysique Spatiale, 91405 Orsay, France
3
Université Paris-Saclay, TAU team INRIA Saclay, CNRS, Laboratoire Interdisciplinaire des Sciences du Numérique, 91190 Gif-sur-Yvette, France
4
Departamento de Física Teórica I, Universidad Complutense, 28040 Madrid, Spain
Received:
6
December
2022
Accepted:
19
April
2023
Degeneracies among parameters of the cosmological model are known to drastically limit the information contained in the matter distribution. In the first paper of this series, we show that the cosmic web environments, namely the voids, walls, filaments and nodes, can be used as leverage to improve the real-space constraints on a set of six cosmological parameters, including the summed neutrino mass. Following up on these results, we propose to investigate the extent to which constraints can be obtained with environment-dependent power spectra in redshift space where the velocities add information to the standard two-point statistics by breaking the isotropy of the matter density field. A Fisher analysis based on a set of thousands of Quijote simulations allows us to conclude that a combination of power spectra computed in several cosmic web environments is able to break some degeneracies. Compared to the matter monopole and quadrupole information alone, the combination of environment-dependent spectra improves constraints on key parameters such as the matter density and the summed neutrino mass by up to a factor of 5.5. Additionally, while the information contained in the matter statistic quickly saturates at mildly non-linear scales in redshift space, a combination of power spectra from different environments appears to be a rich source of information that can be used to improve the constraints at all the studied scales from 0.1 to 0.5 h Mpc−1 and suggests that further improvements could be attainable at even finer scales.
Key words: cosmology: theory / large-scale structure of Universe / cosmological parameters
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This article is published in open access under the Subscribe to Open model. Subscribe to A&A to support open access publication.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.