Euclid preparation. LXXI. Simulations and nonlinearities beyond ΛCDM. 3. Constraints on f(R) models from the photometric primary probes
Loading...
Access rights
openAccess
CC BY
CC BY
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Date
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
24
Series
Astronomy & Astrophysics, Volume 698, pp. 1-24
Abstract
We study the constraint on f(R) gravity that can be obtained by photometric primary probes of the Euclid mission. Our focus is the dependence of the constraint on the theoretical modelling of the nonlinear matter power spectrum. In the Hu–Sawicki f(R) gravity model, we consider four different predictions for the ratio between the power spectrum in f(R) and that in Λ cold dark matter (ΛCDM): a fitting formula, the halo model reaction approach, ReACT, and two emulators based on dark matter only N-body simulations, FORGE and e-Mantis. These predictions are added to the MontePython implementation to predict the angular power spectra for weak lensing (WL), photometric galaxy clustering, and their cross-correlation. By running Markov chain Monte Carlo, we compare constraints on parameters and investigate the bias of the recovered f(R) parameter if the data are created by a different model. For the pessimistic setting of WL, one-dimensional bias for the f(R) parameter, log10| fR0|, is found to be 0.5σ when FORGE is used to create the synthetic data with log10| fR0| = −5.301 and fitted by e-Mantis. The impact of baryonic physics on WL is studied by using a baryonification emulator, BCemu. For the optimistic setting, the f(R) parameter and two main baryonic parameters are well constrained despite the degeneracies among these parameters. However, the difference in the nonlinear dark matter prediction can be compensated for the adjustment of baryonic parameters, and the one-dimensional marginalised constraint on log10| fR0| is biased. This bias can be avoided in the pessimistic setting at the expense of weaker constraints. For the pessimistic setting, using the ΛCDM synthetic data for WL, we obtain the prior-independent upper limit of log10| fR0| < −5.6. Finally, we implement a method to include theoretical errors to avoid the bias due to inaccuracies in the nonlinear matter power spectrum prediction.Description
Publisher Copyright: © The Authors 2025.
Other note
Citation
Koyama, K, Pamuk, S, Casas, S, Bose, B, Carrilho, P, Sáez-Casares, I, Atayde, L, Cataneo, M, Fiorini, B, Giocoli, C, Le Brun, A M C, Pace, F, Pourtsidou, A, Rasera, Y, Sakr, Z, Winther, H A, Altamura, E, Adamek, J, Baldi, M, Breton, M A, Rácz, G, Vernizzi, F, Amara, A, Andreon, S, Auricchio, N, Baccigalupi, C, Bardelli, S, Bernardeau, F, Biviano, A, Bodendorf, C, Bonino, D, Branchini, E, Brescia, M, Brinchmann, J, Caillat, A, Camera, S, Cañas-Herrera, G, Capobianco, V, Carbone, C, Carretero, J, Castellano, M, Castignani, G, Niemi, S M, Sánchez, A G, Wang, Y, Calabrese, M, Gozaliasl, G, Hall, A, Hjorth, J, Liu, S J & Euclid Collaboration 2025, 'Euclid preparation. LXXI. Simulations and nonlinearities beyond ΛCDM. 3. Constraints on f(R) models from the photometric primary probes', Astronomy & Astrophysics, vol. 698, A233, pp. 1-24. https://doi.org/10.1051/0004-6361/202452184