<i>Euclid</i> preparation

We investigated the accuracy and range of validity of the perturbative model for the two-point (2PCF) and three-point (3PCF) correlation functions in real space in view of the forthcoming analysis of the Euclid mission spectroscopic sample. We took advantage of clustering measurements from four snapshots of the Flagship I N -body simulations at z = {0.9,1.2,1.5,1.8}, which mimic the expected galaxy population in the ideal case, i.e. in the absence of observational effects such as purity and completeness. For the 3PCF we considered all available triangular configurations given a minimal separation ( r min ). We first assessed the model performance by fixing the cosmological parameters and evaluating the goodness of fit provided by the perturbative bias expansion in the joint analysis of the two statistics, finding an overall agreement with the data down to separations of 20 h −1 Mpc. Subsequently, we built on the state-of-the-art analysis and extended it to include the dependence on three cosmological parameters: the amplitude of scalar perturbations ( A s ), the matter density ( ω cdm ), and the Hubble parameter ( h ). To achieve this goal, we developed an emulator capable of generating fast and robust modelling predictions for the two summary statistics, which thus enables an efficient sampling of the joint likelihood function. We therefore present the first joint full-shape analysis of the real-space 2PCF and 3PCF, testing the consistency and constraining power of the perturbative model across both probes and assessing its performance in a combined likelihood framework. We explored possible systematic uncertainties induced by the perturbative model at small scales, finding an optimal scale cut of r min = 30 h −1 Mpc for the 3PCF when imposing an additional limitation on the nearly isosceles triangular configurations included in the data vector. This work is part of a series of papers in which we validate theoretical models for galaxy clustering measurements in preparation for the Euclid mission.

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Publication Details

Journal
Astronomy and Astrophysics
Published
2025-11-07
DOI
https://doi.org/10.1051/0004-6361/202556177
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
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article

Euclid preparation

M Viel, S Pires, Marco Marinucci, G. Rodighiero et al.
Astronomy and Astrophysics
Galaxies: Formation, Evolution, Phenomena
article

Euclid preparation

M Viel, S Pires, Marco Marinucci, G. Rodighiero, F Passalacqua, M. Calabrese, S Sacquegna, F. Pasian, Chris Carbone, F. Gianotti, J. Martín-Fleitas, F. Torradeflot, C. Sirignano, M. Brescia, I Tereno, E. Gaztanaga, E. Merlin, A. Biviano, I. Ferrero, H. Böhringer, A. Pugno, D Sapone, E. Bozzo, J. Hjorth, M. Scodeggio, J. Steinwagner, E. Munari, J. García-Bellido, H Hildebrandt, S. Di Domizio, A. Navarro-Alsina, N. Mauri, C. Giocoli, L Patrizii, O. Mansutti, S. Davini, K. Pedersen, A. Franco, Patrice Simon, Paola Dimauro, F. Courbin, Pietro Battaglia, S. Paltani, M. Crocce, A. Díaz‐Sánchez, G. Sirri, J.J Diaz, E. Sellentin, M Radovich, F Raison, L. Guzzo, S. Bardelli, L. Moscardini, M. Fumana, F Faustini, E Medinaceli, Daniele Bertacca, Claudio Moretti, T. Schrabback, L. Gabarra, M Miluzio, M. Magliocchetti, E. Zucca, M. Jhabvala, R. Massey, T. Vassallo, S. Matthew, A Enia, A Troja, C. Valieri, G. Leroy, Valérie Gautard, G. Polenta, C. Baccigalupi, L. Pagano, B. Camacho Quevedo, S Bruton, M. Moresco, G. De Lucia, Vincent Desjacques, Shahab Joudaki, M. Poncet, A. Da Silva, G. Testera, C. Colodro-Conde, F Grupp, M. Lattanzi, N Auricchio, S. Marcin, J. Carretero, S Toft, K. Ganga, H. Dole, Simon Conseil, N Tessore, A. Kiessling, Sébastien Tosi, E. Romelli, C. Burigana, S Quai, J. Weller, P. Reimberg, M Kümmel, H Kurki-Suonio, I Risso, M. Douspis, B. Joachimi, V. Allevato, P. Tallada-Crespí, J. Väliviita, M. Martinelli, Fabio Lepori, M Tenti, D. Karagiannis, T. Castro, C. Padilla Aranda, L Blot, E. Maiorano, D. Potter, A. Tsyganov, G. Meylan, Azadeh Moradinezhad Dizgah, Maria Lembo, C. Porciani, M Sahlén, F. Dubath, F. De Paolis, C. Kirkpatrick, A. Finoguenov, R. Maoli, A. Hornstrup, A Calabrò, B. Sartoris, A. Amara, Sergey Kruk, M. Pöntinen, T. Kitching, M. Béthermin, Chihiro Tao, R. Saglia, K. Jahnkę, M. Farina, S. Camera, Alexander Eggemeier, A. Venhola, S Dusini, V. Kansal, J. Weller, Achille Nucita, F. Giacomini, F. Raison, M. Melchior, A. Balaguera-Antolínez, E. Franceschi, J.A Schewtschenko, B. Gillis, K. Kiiveri, P. Monaco, N. Martinet, María Guidi, Y. Mellier, J. Gracia-Carpio, R. Cabanac, G. Maggio, Kevin Pardede, K Tanidis, M. Maturi, C. Neissner, Romain Teyssier, Michel-Andrès Breton, LAURENCE C. SMITH, M. Archidiacono, F. Finelli⋆, Antonio Farina, T Gasparetto, V. Lindholm, E. Sefusatti, R Farinelli, P.-F Rocci, E. Keihänen, E Branchini, P Vielzeuf, G. Gozaliasl, S. Cavuoti, M. Frailis, A. Spurio Mancini, P. Bergamini, A. Cappi, D. Vergani, Yongshui Kang, K. Paterson, L. Corcione, S. Ligori, D. Maino, W. Holmes, E Sarpa, G. Seidel, C. Hernández–Monteagudo, V. Capobianco, S. Ferriol, A Veropalumbo, C. Padilla, S. Contarini, A Renzi, C. Burigana, Aurel Schneider, M. Bolzonella, I Lloro, M Sereno, L. Stanco, S Nesseris, A. Secroun, Y. Akrami, S. Kermiche, F. Atrio‐Barandela, S Andreon, F. Cogato, D Sciotti, D. Linde, A Pisani, L. Maurin, G. Riccio, M. Kärcher, M. D. Seiffert, F. Finelli, M Kunz, M. Baldi, A. Cimatti, V. Pettorino, V. Scottez, O. Marggraf, G. Mainetti, B. Morin, I. Tereno, V. Pettorino, R. Rebolo, G. Morgante, G Congedo, J. Rhodes, J. Macias-Perez, F. Vernizzi, I Tutusaus, M. Wiesmann, K Naidoo, P. Fosalba, Y. Fang, D. Tavagnacco, L. Conversi, K. Ganga, D. Di Ferdinando, A Grazian, B. Kubik, P. Schneider, X Dupac, Y. Ascasíbar, S. Fotopoulou, Z. Sakr, Y. Wang, S. Galeotta, H. Degaudenzi, M. Roncarelli, G Verza, F Caro, H. Dole, L Valenziano, A. Loureiro, M. Tucci, S.-M. Niemi, S. Borgani, S. de la Torre, A. Mora, J. Lesgourgues, C. Giocoli, L. Leuzzi, D Bagot
article en

Abstract

We investigated the accuracy and range of validity of the perturbative model for the two-point (2PCF) and three-point (3PCF) correlation functions in real space in view of the forthcoming analysis of the Euclid mission spectroscopic sample. We took advantage of clustering measurements from four snapshots of the Flagship I N -body simulations at z = {0.9,1.2,1.5,1.8}, which mimic the expected galaxy population in the ideal case, i.e. in the absence of observational effects such as purity and completeness. For the 3PCF we considered all available triangular configurations given a minimal separation ( r min ). We first assessed the model performance by fixing the cosmological parameters and evaluating the goodness of fit provided by the perturbative bias expansion in the joint analysis of the two statistics, finding an overall agreement with the data down to separations of 20 h −1 Mpc. Subsequently, we built on the state-of-the-art analysis and extended it to include the dependence on three cosmological parameters: the amplitude of scalar perturbations ( A s ), the matter density ( ω cdm ), and the Hubble parameter ( h ). To achieve this goal, we developed an emulator capable of generating fast and robust modelling predictions for the two summary statistics, which thus enables an efficient sampling of the joint likelihood function. We therefore present the first joint full-shape analysis of the real-space 2PCF and 3PCF, testing the consistency and constraining power of the perturbative model across both probes and assessing its performance in a combined likelihood framework. We explored possible systematic uncertainties induced by the perturbative model at small scales, finding an optimal scale cut of r min = 30 h −1 Mpc for the 3PCF when imposing an additional limitation on the nearly isosceles triangular configurations included in the data vector. This work is part of a series of papers in which we validate theoretical models for galaxy clustering measurements in preparation for the Euclid mission.

Astronomy and AstrophysicsVol. 707
Université Claude Bernard Lyon 1 (FR), Institut polytechnique de Grenoble (FR), University of Geneva (CH), Institució Catalana de Recerca i Estudis Avançats (ES), Leiden University (NL), California Institute of Technology (US), University of Copenhagen (DK), Centre National de la Recherche Scientifique (FR), Goddard Space Flight Center (US), University of Hawaii System (US), Jet Propulsion Laboratory (US), Université Toulouse III - Paul Sabatier (FR), Consejo Superior de Investigaciones Científicas (ES), University of Bonn (DE), Scuola Internazionale Superiore di Studi Avanzati (IT), University of Padua (IT), University of Lisbon (PT), University of Salento (IT), Université de Toulon (FR), University of Waterloo (CA), Universidad de La Laguna (ES), Stockholm University (SE), University of Groningen (NL), Technion – Israel Institute of Technology (IL), Université Fédérale de Toulouse Midi-Pyrénées (FR), Lyon College (US), Université Catholique de Lille (FR), Universidade do Porto (PT), Perimeter Institute (CA), Royal Holloway University of London (GB), University of Oslo (NO), Universidad de Salamanca (ES), Institute for High Energy Physics (ES), University of Milan (IT), Durham University (GB), Universität Innsbruck (AT), University of Saint Joseph (US), Princeton University (US), University of Ferrara (IT), University of Zurich (CH), University of California, Irvine (US), Université Paris Cité (FR), Aix-Marseille Université (FR), Heidelberg University (DE), University of Cambridge (GB), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris Sciences et Lettres (FR), Université Paris-Saclay (FR), Centre National d'Études Spatiales (FR), Arcetri Astrophysical Observatory (IT), 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), Laboratoire AstroParticule et Cosmologie (FR), Observatoire astronomique de Strasbourg (FR), Brera Astronomical Observatory (IT), University of Surrey (GB), FHNW University of Applied Sciences and Arts Northwestern Switzerland (CH), United Kingdom Space Agency (GB), Universidad Politécnica de Cartagena (ES), University of Bristol (GB), Sorbonne Université (FR), University of Oxford (GB), Park University (US), Osservatorio astronomico di Bologna (IT), Astrophysique, Instrumentation et Modélisation (FR), Max Planck Institute for Physics (DE), Institute of Astrophysics and Space Sciences (PT), ARC Centre of Excellence for Dark Matter Particle Physics (AU), Sorbonne Paris Cité (FR), Max Planck Institute for Extraterrestrial Physics (DE), Institut d'Estudis Espacials de Catalunya (ES), Istituto Nazionale di Fisica Nucleare, Sezione di Lecce (IT), Laboratoire d'Annecy de Physique Théorique (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Torino (IT), Institute for Space Astrophysics and Planetology (IT), Institut d'Astrophysique Spatiale (FR), Max Planck Institute for Astrophysics (DE), International University of Beirut (LB), Institut Català de Ciències del Clima (ES), Istituto Nazionale di Fisica Nucleare, Sezione di Padova (IT), Osservatorio Astrofisico di Torino (IT), Royal Observatory (GB), Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT), SKA Observatory (GB), Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (IT), Centro de Astrofísica da Universidade do Porto (PT), Max Planck Institute for Astronomy (DE), Institute of Space Sciences (ES), Laboratoire de Physique Théorique (FR), DAWN Center for Independent Living (US), Centre for Theoretical Physics and Astrophysics (UZ), Istituto di Radioastronomia di Bologna (IT), Kavli Institute for the Physics and Mathematics of the Universe (JP), Federico II University Hospital (IT), Unidades Centrales Científico-Técnicas (ES), Mathematical Institute of the Slovak Academy of Sciences (SK), Institute of Astronomy (RU), National Observatory (BR), Institute of Theoretical Physics (CN), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT), Observatoire de la Côte d’Azur (FR), CEA Paris-Saclay (FR), Naples Anesthesia & Physician Associates (US), Instituto de Astrofísica de Canarias (ES), Felix Scholarship (GB), Institut National de Physique Nucléaire et de Physique des Particules (FR), 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), Computing Center (RU), Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (FR), Osservatorio Astronomico della Regione Autonoma Valle d'Aosta (IT), Engineering Science Analysis (United States) (US), Astronomy and Space (AU), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (IT), Port d'Informació Científica (ES), Istituto Nazionale di Fisica Nucleare, Sezione di Trieste (IT), Institute for Fundamental Physics of the Universe (IT), Instituto de Física de Cantabria (ES), Flatiron Health (United States) (US), St. Joseph Medical Center (US), Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT), Osservatorio Astronomico di Padova (IT), Bristol Robotics Laboratory (GB), 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, Flatiron Institute (US), European Space Research and Technology Centre (NL), University College London (GB), Imperial College London (GB), École Polytechnique Fédérale de Lausanne (CH), University of Turin (IT), Swinburne University of Technology (AU), Case Western Reserve University (US), Technical University of Munich (DE), University of Portsmouth (GB), University of Chile (CL), Université Savoie Mont Blanc (FR), Heidelberg Institute for Theoretical Studies (DE), École Centrale de Lille (FR), Ludwig-Maximilians-Universität München (DE), University of Genoa (IT), Sapienza University of Rome (IT), University of the Western Cape (ZA), National Institute for Astrophysics (IT), RWTH Aachen University (DE), Université Grenoble Alpes (FR), University of Bologna (IT), Technical University of Denmark (DK), University of Edinburgh (GB), Aalto University (FI)
Openalex Percentile: Top 77%
Galaxies: Formation, Evolution, Phenomena
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