<i>Euclid</i> : Constraints on f(R) cosmologies from the spectroscopic and photometric primary probes

We forecast the constraints that the Euclid mission will place on the Hu–Sawicki f ( R ) modified gravity model using galaxy clustering and weak lensing observations. Euclid ’s primary probes will provide spectroscopic redshifts, photometric angular clustering, and weak lensing cosmic shear, thus allowing for precise tests of deviations from general relativity. We consider these observables to evaluate how well Euclid can constrain the extended model parameter f R 0 . For a fiducial value of | f R 0 | = 5 × 10 −6 , we find that in our baseline pessimistic setting, Euclid will constrain log 10 | f R 0 | at the 4% level with spectroscopic clustering, at 2.7% with the cross-correlation of photometric probes, and at 1.8% when combining all primary probes. This corresponds to an estimation on this model parameter of approximately | f R 0 = (5.0 +1.2 −0.9 × 10 −6 at the 1 σ level. We also forecast constraints for models with | f R 0 | = 5 × 10 −5 and | f R 0 | = 5 × 10 −7 , finding that Euclid will distinguish these from the standard cosmological model at more than 3 σ when using the full combination of primary probes. Euclid will be a powerful experiment to test modifications to gravity, provided that the theoretical systematics of the non-linear modelling are kept under control.

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Journal
Astronomy and Astrophysics
Published
2025-11-04
DOI
https://doi.org/10.1051/0004-6361/202348713
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
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article

Euclid : Constraints on f(R) cosmologies from the spectroscopic and photometric primary probes

S Pires, G. Seidel, J. Brinchmann, G. Riccio et al.
Astronomy and Astrophysics
Galaxies: Formation, Evolution, Phenomena
article

Euclid : Constraints on f(R) cosmologies from the spectroscopic and photometric primary probes

S Pires, G. Seidel, J. Brinchmann, G. Riccio, L. Conversi, N. Auricchio, J.-L. Starck, C. Sirignano, M. Brescia, I. Hook, J. Carretero, C. Surace, F. Marulli, C. Giocoli, F. Courbin, A. Grazian, E Maiorano, Noemi Frusciante, E. Munari, C. Bodendorf, Lucas Lombriser, S.-M Niemi, S. Farrens, S. Andreon, S. Cavuoti, A. Kiessling, R. Massey, T. Vassallo, S. Paltani, R. Toledo-Moreo, M. Moresco, D. Sapone, M. Meneghetti, F. Lacasa, I Lloro, L. Valenziano, E. Merlin, M. Martinelli, Christopher J. Conselice, A. Cimatti, O. Mansutti, G. Parimbelli, P. Tallada-Crespí, W. Gillard, Alkistis Pourtsidou, L. Conversi, C. Padilla Aranda, K. Pedersen, B. Gillis, M. Roncarelli, F. Dubath, H. Degaudenzi, A. Hornstrup, V.F Cardone, E. Medinaceli, Massimo Pietroni, B. Altieri, F. Pasian, C.A.J Duncan, J. Weller, S. Ligori, M. Castellano, S. Galeotta, F. Raison, E. Franceschi, O. Marggraf, K Jahnke, S. Dusini, K. Koyama, S. Camera, Z. Sakr, E. Rossetti, E. Romelli, M. Frailis, G Sirri, C. Carbone, Y Mellier, S. Kermiche, L. Corcione, S. Ferriol, J. M. Diego, M Kunz, V. Pettorino, J. Garcia-Bellido, F. Torradeflot, S. Serrano, G. Polenta, M. Poncet, B. Garilli, E. Branchini, A. Secroun, F Grupp, H. M. Courtois, A. Da Silva, L. Stančo, Francesco Pace, Alessandra Silvestri, I. Tutusaus, N. Aghanim, B. Sartoris, T. Kitching, M. Kilbinger, A Amara, P. Ntelis, I. Tereno, G. Meylan, F. Vernizzi, V. Scottez, H. Kurki‐Suonio, P. Hudelot, J. Zoubian, F. Hormuth, Y. Wang, P. Fosalba, J Rhodes, M. Fumana, R. Saglia, M Archidiacono, L. Moscardini, R. Cledassou, G. Congedo, A. Renzi
article en

Abstract

We forecast the constraints that the Euclid mission will place on the Hu–Sawicki f ( R ) modified gravity model using galaxy clustering and weak lensing observations. Euclid ’s primary probes will provide spectroscopic redshifts, photometric angular clustering, and weak lensing cosmic shear, thus allowing for precise tests of deviations from general relativity. We consider these observables to evaluate how well Euclid can constrain the extended model parameter f R 0 . For a fiducial value of | f R 0 | = 5 × 10 −6 , we find that in our baseline pessimistic setting, Euclid will constrain log 10 | f R 0 | at the 4% level with spectroscopic clustering, at 2.7% with the cross-correlation of photometric probes, and at 1.8% when combining all primary probes. This corresponds to an estimation on this model parameter of approximately | f R 0 = (5.0 +1.2 −0.9 × 10 −6 at the 1 σ level. We also forecast constraints for models with | f R 0 | = 5 × 10 −5 and | f R 0 | = 5 × 10 −7 , finding that Euclid will distinguish these from the standard cosmological model at more than 3 σ when using the full combination of primary probes. Euclid will be a powerful experiment to test modifications to gravity, provided that the theoretical systematics of the non-linear modelling are kept under control.

Astronomy and AstrophysicsVol. 707
Université Claude Bernard Lyon 1 (FR), University of Geneva (CH), Leiden University (NL), California Institute of Technology (US), University of Parma (IT), Centre National de la Recherche Scientifique (FR), Jet Propulsion Laboratory (US), Université Toulouse III - Paul Sabatier (FR), University of Bonn (DE), Scuola Internazionale Superiore di Studi Avanzati (IT), University of Padua (IT), University of Lisbon (PT), University of Waterloo (CA), University of Groningen (NL), Université Fédérale de Toulouse Midi-Pyrénées (FR), Lyon College (US), Université Catholique de Lille (FR), Universidade do Porto (PT), Perimeter Institute (CA), University of Oslo (NO), Institute for High Energy Physics (ES), University of Milan (IT), University of Saint Joseph (US), Aarhus University (DK), Université Paris Cité (FR), Aix-Marseille Université (FR), Heidelberg University (DE), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris-Saclay (FR), Centre National d'Études Spatiales (FR), Helsinki Institute of Physics (FI), Astronomical Observatory of Rome (IT), Trieste Astronomical Observatory (IT), Institut d'Astrophysique de Paris (FR), Astronomical Observatory of Capodimonte (IT), European Space Agency (FR), Brera Astronomical Observatory (IT), Center for Theoretical Physics (PL), United Kingdom Space Agency (GB), Universidad Politécnica de Cartagena (ES), Sorbonne Université (FR), University of Oxford (GB), Park University (US), Osservatorio astronomico di Bologna (IT), Astrophysique, Instrumentation et Modélisation (FR), Institute of Astrophysics and Space Sciences (PT), Max Planck Institute for Extraterrestrial Physics (DE), Institut d'Estudis Espacials de Catalunya (ES), Istituto Nazionale di Fisica Nucleare, Sezione di Torino (IT), Institut d'Astrophysique Spatiale (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Padova (IT), Osservatorio Astrofisico di Torino (IT), Royal Observatory (GB), SKA Observatory (GB), Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (IT), Max Planck Institute for Astronomy (DE), Institute of Space Sciences (ES), Laboratoire de Physique Théorique (FR), DAWN Center for Independent Living (US), Federico II University Hospital (IT), Institute of Theoretical Physics (CN), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT), CEA Paris-Saclay (FR), Naples Anesthesia & Physician Associates (US), Institut National de Physique Nucléaire et de Physique des Particules (FR), von Hoerner & Sulger (Germany) (DE), Astronomical Institute of the Slovak Academy of Sciences (SK), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (IT), Institute of Space Science - INFLPR Subsidiary (RO), Engineering Science Analysis (United States) (US), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (IT), Port d'Informació Científica (ES), Institute for Fundamental Physics of the Universe (IT), Instituto de Física de Cantabria (ES), St. Joseph Medical Center (US), Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT), Osservatorio Astronomico di Padova (IT), Institut de Physique Théorique (FR), European Space Research Institute (IT), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES), Institut de Recherche en Astrophysique et Planétologie (FR), Infrared Processing and Analysis Center (US), Osservatorio di Astrofisica e Scienza dello Spazio, European Space Research and Technology Centre (NL), University College London (GB), École Polytechnique Fédérale de Lausanne (CH), University of Turin (IT), University of Portsmouth (GB), University of Chile (CL), Heidelberg Institute for Theoretical Studies (DE), Ludwig-Maximilians-Universität München (DE), University of Genoa (IT), National Institute for Astrophysics (IT), RWTH Aachen University (DE), Netherlands Institute for Radio Astronomy (NL), University of Bologna (IT), Technical University of Denmark (DK), University of Edinburgh (GB)
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Galaxies: Formation, Evolution, Phenomena
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