Euclid preparation
Astronomy and Astrophysics, vol. 713, pp. A259
Abstract
Accurate modelling of redshift-space distortions (RSDs) is essential for maximising the cosmological information extracted from large galaxy redshift surveys. In preparation for the forthcoming analysis of the Euclid spectroscopic data, we investigated three approaches to modelling RSD effects on the power spectrum multipoles of mock H α emission line galaxies. We focused on two one-loop perturbation theory models – the effective field theory (EFT) and velocity difference generator (VDG ∞ ) – that differ in their treatment of the real-to-redshift space mapping on small scales and a third approach, the BACCO emulator, that adopts a hybrid strategy combining perturbation theory with high-resolution N -body simulations. We assessed the ability of these models to recover key cosmological parameters, including the expansion rate h , the cold dark matter density parameter ω c , and the scalar amplitude A s across four redshift bins spanning 0.9 ≤ z ≤ 1.8. In each bin, we found that VDG ∞ and BACCO outperform the EFT model across all scales up to k max ≲ 0.35 h Mpc −1 . While BACCO saturates in constraining power at intermediate scales and higher redshift, the VDG ∞ model continues to improve parameter constraints beyond k max ≳ 0.30 h Mpc −1 . The EFT model, although robust on large scales, exhibits significant parameter biases for k max ≳ 0.25 h Mpc −1 , limiting its applicability to Euclid -like H α samples. Among the full perturbation theory-based models, the enhanced treatment of small-scale effects of RSDs in VDG ∞ improves cosmological parameter constraints by up to a factor of two.
Authors 99
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Scuola Internazionale Superiore di Studi Avanzati · National Institute for Astrophysics · Trieste Astronomical Observatory · Universitat Politècnica de Catalunya · Institute for Fundamental Physics of the Universe · Institute of Space Sciences · Institut d'Estudis Espacials de Catalunya
Affiliation as printed
IFPU, Institute for Fundamental Physics of the Universe
INAF-Osservatorio Astronomico di Trieste
Institut d’Estudis Espacials de Catalunya (IEEC), Edifici RDIT, Campus UPC
Institute of Space Sciences (ICE, CSIC), Campus UAB
SISSA, International School for Advanced Studies
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Universitat Politècnica de Catalunya · Institute of Space Sciences · Institut d'Estudis Espacials de Catalunya
Affiliation as printed
Institut d’Estudis Espacials de Catalunya (IEEC), Edifici RDIT, Campus UPC
Institute of Space Sciences (ICE, CSIC), Campus UAB
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University of Edinburgh · Royal Observatory
Affiliation as printed
Institute for Astronomy, University of Edinburgh, Royal Observatory
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Ikerbasque · Donostia International Physics Center
Affiliation as printed
Donostia International Physics Center (DIPC)
IKERBASQUE, Basque Foundation for Science
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National Institute for Astrophysics · Brera Astronomical Observatory
Affiliation as printed
INAF-Osservatorio Astronomico di Brera
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Affiliation as printed
Universität Bonn, Argelander-Institut für Astronomie
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Universitat Politècnica de Catalunya · Institute of Space Sciences · Institut d'Estudis Espacials de Catalunya
Affiliation as printed
Institut d’Estudis Espacials de Catalunya (IEEC), Edifici RDIT, Campus UPC
Institute of Space Sciences (ICE, CSIC), Campus UAB
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National Institute for Astrophysics · Trieste Astronomical Observatory · Istituto Nazionale di Fisica Nucleare, Sezione di Trieste · Institute for Fundamental Physics of the Universe
Affiliation as printed
IFPU, Institute for Fundamental Physics of the Universe
INAF-Osservatorio Astronomico di Trieste
INFN, Sezione di Trieste
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National Institute for Astrophysics · Trieste Astronomical Observatory · Istituto Nazionale di Fisica Nucleare, Sezione di Trieste · Institute for Fundamental Physics of the Universe
Affiliation as printed
IFPU, Institute for Fundamental Physics of the Universe
INAF-Osservatorio Astronomico di Trieste
INFN, Sezione di Trieste
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Centre National de la Recherche Scientifique · Université Savoie Mont Blanc · Laboratoire d'Annecy de Physique Théorique
Affiliation as printed
Laboratoire d’Annecy-le-Vieux de Physique Theorique, CNRS & Universite Savoie Mont Blanc
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Universitat Politècnica de Catalunya · University of Portsmouth · Institute of Space Sciences · Institut d'Estudis Espacials de Catalunya
Affiliation as printed
Institut d’Estudis Espacials de Catalunya (IEEC), Edifici RDIT, Campus UPC
Institute of Cosmology and Gravitation, University of Portsmouth
Institute of Space Sciences (ICE, CSIC), Campus UAB
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Affiliation as printed
Department of Physics, Oxford University
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Centre National de la Recherche Scientifique · Université Paris-Saclay · Commissariat à l'Énergie Atomique et aux Énergies Alternatives · Astrophysique, Instrumentation et Modélisation · Université Paris Cité
Affiliation as printed
Université Paris-Saclay, Université Paris Cité, CEA, CNRS, AIM
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Affiliation as printed
Université de Genève, Département de Physique Théorique and Centre for Astroparticle Physics
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Technion – Israel Institute of Technology
Affiliation as printed
Technion Israel Institute of Technology
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Centre National de la Recherche Scientifique · Aix-Marseille Université
Affiliation as printed
Aix-Marseille Université, CNRS, CNES, LAM
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Universitat Politècnica de Catalunya · Institute of Space Sciences · Institut d'Estudis Espacials de Catalunya
Affiliation as printed
Institut d’Estudis Espacials de Catalunya (IEEC), Edifici RDIT, Campus UPC
Institute of Space Sciences (ICE, CSIC), Campus UAB
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics · University of Bologna
Affiliation as printed
Dipartimento di Fisica e Astronomia, Università di Bologna
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
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Affiliation as printed
Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano
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Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Parma
Affiliation as printed
INFN Gruppo Collegato di Parma
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Affiliation as printed
Universität Bonn, Argelander-Institut für Astronomie
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Affiliation as printed
Universität Bonn, Argelander-Institut für Astronomie
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National Institute for Astrophysics · Trieste Astronomical Observatory · University of Trieste · Istituto Nazionale di Fisica Nucleare, Sezione di Trieste · Institute for Fundamental Physics of the Universe
Affiliation as printed
Dipartimento di Fisica – Sezione di Astronomia, Università di Trieste
IFPU, Institute for Fundamental Physics of the Universe
INAF-Osservatorio Astronomico di Trieste
INFN, Sezione di Trieste
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Scuola Internazionale Superiore di Studi Avanzati · National Institute for Astrophysics · Trieste Astronomical Observatory · Fondazione ICSC Centro Nazionale di Ricerca in High Performance Computing, Big Data e Quantum Computing
Affiliation as printed
ICSC – Centro Nazionale di Ricerca in High Performance Computing, Big Data e Quantum Computing
INAF-Osservatorio Astronomico di Trieste
SISSA, International School for Advanced Studies
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National Institute for Astrophysics · University of Genoa · Istituto Nazionale di Fisica Nucleare, Sezione di Genova · Brera Astronomical Observatory
Affiliation as printed
Dipartimento di Fisica, Università di Genova
INAF-Osservatorio Astronomico di Brera
INFN-Sezione di Genova
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European Space Agency · European Space Astronomy Centre
Affiliation as printed
ESAC/ESA
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National Institute for Astrophysics · Brera Astronomical Observatory
Affiliation as printed
INAF-Osservatorio Astronomico di Brera
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics
Affiliation as printed
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
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Scuola Internazionale Superiore di Studi Avanzati · National Institute for Astrophysics · Trieste Astronomical Observatory · Istituto Nazionale di Fisica Nucleare, Sezione di Trieste · Institute for Fundamental Physics of the Universe
Affiliation as printed
IFPU, Institute for Fundamental Physics of the Universe
INAF-Osservatorio Astronomico di Trieste
INFN, Sezione di Trieste
SISSA, International School for Advanced Studies
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics · Istituto Nazionale di Fisica Nucleare, Sezione di Bologna · University of Bologna
Affiliation as printed
Dipartimento di Fisica e Astronomia, Università di Bologna
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
INFN-Sezione di Bologna
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics
Affiliation as printed
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
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Ludwig-Maximilians-Universität München · Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Max Planck Institute for Extraterrestrial Physics
Universitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität München
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National Institute for Astrophysics · Trieste Astronomical Observatory · Institute for Fundamental Physics of the Universe
Affiliation as printed
IFPU, Institute for Fundamental Physics of the Universe
INAF-Osservatorio Astronomico di Trieste
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National Institute for Astrophysics · University of Genoa · Istituto Nazionale di Fisica Nucleare, Sezione di Genova · Brera Astronomical Observatory
Affiliation as printed
Dipartimento di Fisica, Università di Genova
INAF-Osservatorio Astronomico di Brera
INFN-Sezione di Genova
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National Institute for Astrophysics · University of Naples Federico II · Astronomical Observatory of Capodimonte
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Department of Physics “E. Pancini”, University Federico II
INAF-Osservatorio Astronomico di Capodimonte
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National Institute for Astrophysics · Istituto Nazionale di Fisica Nucleare, Sezione di Torino · University of Turin · Osservatorio Astrofisico di Torino
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Dipartimento di Fisica, Università degli Studi di Torino
INAF-Osservatorio Astrofisico di Torino
INFN-Sezione di Torino
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National Institute for Astrophysics · Osservatorio Astrofisico di Torino
Affiliation as printed
INAF-Osservatorio Astrofisico di Torino
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National Institute for Astrophysics
Affiliation as printed
INAF-IASF Milano
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National Institute for Astrophysics · Istituto Nazionale di Fisica Nucleare, Sezione di Roma I · Astronomical Observatory of Rome
Affiliation as printed
INAF-Osservatorio Astronomico di Roma
INFN-Sezione di Roma
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Universitat Autònoma de Barcelona · Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas · Port d'Informació Científica
Affiliation as printed
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT)
Port d’Informació Científica, Campus UAB
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RWTH Aachen University · Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
Affiliation as printed
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR), Linder Höhe
Institute for Theoretical Particle Physics and Cosmology (TTK), RWTH Aachen University
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Universitat Politècnica de Catalunya · Institute of Space Sciences · Institut d'Estudis Espacials de Catalunya
Affiliation as printed
Institut d’Estudis Espacials de Catalunya (IEEC), Edifici RDIT, Campus UPC
Institute of Space Sciences (ICE, CSIC), Campus UAB
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National Institute for Astrophysics · Astronomical Observatory of Rome
Affiliation as printed
INAF-Osservatorio Astronomico di Roma
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics
Affiliation as printed
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
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National Institute for Astrophysics · Istituto Nazionale di Fisica Nucleare · Istituto Nazionale di Fisica Nucleare, Sezione di Napoli · Astronomical Observatory of Capodimonte
Affiliation as printed
INAF-Osservatorio Astronomico di Capodimonte
INFN section of Naples
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University of Hawaiʻi at Mānoa · University of Hawaii System
Affiliation as printed
Institute for Astronomy, University of Hawaii
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Affiliation as printed
Dipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di Bologna
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Instituto de Astrofísica de Canarias
Affiliation as printed
Instituto de Astrofísica de Canarias
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University of Edinburgh · Royal Observatory
Affiliation as printed
Institute for Astronomy, University of Edinburgh, Royal Observatory
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European Space Agency · European Space Astronomy Centre · European Space Research Institute
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ESAC/ESA
European Space Agency/ESRIN
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Centre National de la Recherche Scientifique · Institut National de Physique Nucléaire et de Physique des Particules · Lyon 1 Université · Institut de Physique des 2 Infinis de Lyon
Affiliation as printed
Université Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822
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Institut de Ciències del Cosmos · Universitat de Barcelona · Institució Catalana de Recerca i Estudis Avançats · Universitat Politècnica de Catalunya · Institut d'Estudis Espacials de Catalunya
Affiliation as printed
Institució Catalana de Recerca i Estudis Avançats (ICREA)
Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB)
Institut d’Estudis Espacials de Catalunya (IEEC), Edifici RDIT, Campus UPC
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Centre National de la Recherche Scientifique · Institut National de Physique Nucléaire et de Physique des Particules · Institut de Physique des 2 Infinis de Lyon
Affiliation as printed
UCB Lyon 1, CNRS/IN2P3, IUF, IP2I Lyon
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Affiliation as printed
Department of Astronomy, University of Geneva
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National Institute for Astrophysics · Trieste Astronomical Observatory
Affiliation as printed
INAF-Osservatorio Astronomico di Trieste
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Centre National de la Recherche Scientifique · Université Paris-Saclay · Institut d'Astrophysique Spatiale
Affiliation as printed
Université Paris-Saclay, CNRS, Institut d’astrophysique spatiale
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Centre National de la Recherche Scientifique · Université Paris-Saclay · Institut d'Astrophysique Spatiale
Affiliation as printed
Université Paris-Saclay, CNRS, Institut d’astrophysique spatiale
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Affiliation as printed
Department of Astronomy, University of Geneva
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University of Edinburgh · Royal Observatory
Affiliation as printed
Institute for Astronomy, University of Edinburgh, Royal Observatory
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European Space Agency · European Space Astronomy Centre
Affiliation as printed
ESAC/ESA
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Istituto Nazionale di Fisica Nucleare, Sezione di Padova · Istituto Nazionale di Fisica Nucleare
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INFN-Padova
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Centre National de la Recherche Scientifique · Institut National de Physique Nucléaire et de Physique des Particules · Aix-Marseille Université · Centre de physique des particules de Marseille
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Aix-Marseille Université, CNRS/IN2P3, CPPM
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National Institute for Astrophysics · Institute for Space Astrophysics and Planetology
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INAF-Istituto di Astrofisica e Planetologia Spaziali
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics
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INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
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Centre National de la Recherche Scientifique · Université Paris-Saclay · Commissariat à l'Énergie Atomique et aux Énergies Alternatives · Astrophysique, Instrumentation et Modélisation · Université Paris Cité
Affiliation as printed
Université Paris-Saclay, Université Paris Cité, CEA, CNRS, AIM
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Centre National de la Recherche Scientifique · Institut National de Physique Nucléaire et de Physique des Particules · Lyon 1 Université · Institut de Physique des 2 Infinis de Lyon
Affiliation as printed
Université Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics · Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
Affiliation as printed
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
INFN-Bologna
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Affiliation as printed
School of Physics, HH Wills Physics Laboratory, University of Bristol
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Centre National de la Recherche Scientifique · Institut National de Physique Nucléaire et de Physique des Particules · Aix-Marseille Université · Centre de physique des particules de Marseille
Affiliation as printed
Aix-Marseille Université, CNRS/IN2P3, CPPM
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National Institute for Astrophysics · Trieste Astronomical Observatory
Affiliation as printed
INAF-Osservatorio Astronomico di Trieste
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics
Affiliation as printed
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
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National Institute for Astrophysics
Affiliation as printed
INAF-IASF Milano
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National Institute for Astrophysics · Trieste Astronomical Observatory
Affiliation as printed
INAF-Osservatorio Astronomico di Trieste
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Ludwig-Maximilians-Universität München
Affiliation as printed
University Observatory, LMU Faculty of Physics
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University of Edinburgh · Royal Observatory
Affiliation as printed
Institute for Astronomy, University of Edinburgh, Royal Observatory
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics · Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
Affiliation as printed
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
INFN-Sezione di Bologna
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Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Max Planck Institute for Extraterrestrial Physics
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National Institute for Astrophysics · Osservatorio Astronomico di Padova
Affiliation as printed
INAF-Osservatorio Astronomico di Padova
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Ludwig-Maximilians-Universität München · Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Max Planck Institute for Extraterrestrial Physics
Universitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität München
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National Institute for Astrophysics · University of Milan · Istituto Nazionale di Fisica Nucleare, Sezione di Milano · Brera Astronomical Observatory
Affiliation as printed
Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano
INAF-Osservatorio Astronomico di Brera
INFN-Sezione di Milano
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Affiliation as printed
Institute of Theoretical Astrophysics, University of Oslo
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Affiliation as printed
Jet Propulsion Laboratory, California Institute of Technology
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Affiliation as printed
Felix Hormuth Engineering
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Technical University of Denmark
Affiliation as printed
Cosmic Dawn Center (DAWN)
Technical University of Denmark
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Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck-Institut für Astronomie
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Affiliation as printed
Department of Physics and Astronomy, University College London
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Centre National de la Recherche Scientifique · Institut National de Physique Nucléaire et de Physique des Particules · Aix-Marseille Université · Centre de physique des particules de Marseille
Affiliation as printed
Aix-Marseille Université, CNRS/IN2P3, CPPM
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Affiliation as printed
Jet Propulsion Laboratory, California Institute of Technology
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Centre National de la Recherche Scientifique · Institut National de Physique Nucléaire et de Physique des Particules · Lyon 1 Université · Institut de Physique des 2 Infinis de Lyon
Affiliation as printed
Université Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822
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Ludwig-Maximilians-Universität München
Affiliation as printed
Universitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität München
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Affiliation as printed
Université de Genève, Département de Physique Théorique and Centre for Astroparticle Physics
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Affiliation as printed
Department of Physics
Helsinki Institute of Physics
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Centre National de la Recherche Scientifique · Université Paris Sciences et Lettres · Sorbonne Université · Observatoire de Paris · Laboratoire d'Étude de l'Univers et des Phénomènes Extrêmes
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Laboratoire d’etude de l’Univers et des phenomenes eXtremes, Observatoire de Paris, Université PSL, Sorbonne Université, CNRS
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National Institute for Astrophysics · Osservatorio Astrofisico di Torino
Affiliation as printed
INAF-Osservatorio Astrofisico di Torino
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Affiliation as printed
Institute of Theoretical Astrophysics, University of Oslo
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Affiliation as printed
Department of Physics
Helsinki Institute of Physics
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Affiliation as printed
SKAO
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Centre National de la Recherche Scientifique · Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules
Affiliation as printed
Centre de Calcul de l’IN2P3/CNRS
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Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics
Affiliation as printed
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
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