| Issue |
A&A
Volume 706, February 2026
|
|
|---|---|---|
| Article Number | A380 | |
| Number of page(s) | 17 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361/202556020 | |
| Published online | 23 February 2026 | |
Growth rate measurements from a joint analysis of the large-scale galaxy clustering in Fourier and configuration space
1
Aix Marseille Univ, CNRS/IN2P3, CPPM Marseille, France
2
IRFU, CEA, Université Paris-Saclay F-91191 Gif-sur-Yvette, France
3
Departament de Física Quántica i Astrofísica, Universitat de Barcelona Martí i Franqués 1 E08028 Barcelona, Spain
4
Institut d’Estudis Espacials de Catalunya (IEEC) 08034 Barcelona, Spain
5
Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (UB), c. Martí i Franquès 1 08028 Barcelona, Spain
★ Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
18
June
2025
Accepted:
4
December
2025
In this work, we test a framework to analyse redshift-space distortions in configuration and Fourier space simultaneously. We tested our methods with the AbacusSummit suite of N-body simulations as well as a more numerous set of approximate EZmocks, and reproduced the sample of luminous red galaxies from the Baryon Oscillation Spectroscopic Survey (BOSS) and its extension (eBOSS). Our clustering models are based on the effective field theory of large-scale structures in a Lagrangian frame, which is used in the latest results from the Dark Energy Spectroscopic Instrument. We performed a template type of analysis, including dilation parameters and the slope parameter from the ShapeFit framework. We find that the joint space inference yields unbiased and robust constraints on simulated datasets that are consistent with the results from individual spaces or previous methods to obtain consensus results. Our joint space analysis on the BOSS+eBOSS LRG sample obtains fσ8 = 0.463 ± 0.052, which is in good agreement with the official 2020 results.
Key words: cosmological parameters / cosmology: observations / dark energy / large-scale structure of Universe
© The Authors 2026
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.
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