Euclid: Impact of non-linear and baryonic feedback prescriptions on cosmological parameter estimation from weak lensing cosmic shear
Year: 2021
Type: article
Abstract: Upcoming surveys will map the growth of large-scale structure with unprecented precision, improving our understanding of the dark sector of the Universe. Unfortunately, much of the cosmological information is encoded on small scales, where the clustering of dark matter and the effects of astrophysical feedback processes are not fully understood. This can bias the estimates of cosmological parameters, which we study here for a joint analysis of mock Euclid cosmic shear and Planck cosmic microwave background data. We use different implementations for the modelling of the signal on small scales and find that they result in significantly different predictions. Moreover, the different non-linear corrections lead to biased parameter estimates, especially when the analysis is extended into the highly non-linear regime, with the Hubble constant, H0, and the clustering amplitude, σ8, affected the most. Improvements in the modelling of non-linear scales will therefore be needed if we are to resolve the current tension with more and better data. For a given prescription for the non-linear power spectrum, using different corrections for baryon physics does not significantly impact the precision of Euclid, but neglecting these correction does lead to large biases in the cosmological parameters. In order to extract precise and unbiased constraints on cosmological parameters from Euclid cosmic shear data, it is therefore essential to improve the accuracy of the recipes that account for non-linear structure formation, as well as the modelling of the impact of astrophysical processes that redistribute the baryons.
Source: Astronomy and Astrophysics
Authors: M. Martinelli, I. Tutusaus, M. Archidiacono, S. Camera, V. F. Cardone, S. Clesse, S. Casas, L. Casarini, D. F. Mota, H. Hoekstra, C. Carbone, S. Ilić, T. D. Kitching, V. Pettorino, A. Pourtsidou, Z. Sakr, D. Sapone, N. Auricchio, A. Balestra, A. Boucaud, E. Branchini, M. Brescia, V. Capobianco, J. Carretero, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, C. Conselice, L. Conversi, L. Corcione, A. Costille, M. Douspis, F. Dubath, S. Dusini, G. Fabbian, P. Fosalba, M. Frailis, E. Franceschi, B. Gillis, C. Giocoli, F. Grupp, L. Guzzo, W. Holmes, F. Hormuth, K. Jahnke, S. Kermiche, A. Kiessling, M. Kilbinger, M. Kunz, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I. Lloro, E. Maiorano, O. Marggraf, K. Markovic, R. Massey, M. Meneghetti, G. Meylan, B. Morin, L. Moscardini, S. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, S. Pires, G. Polenta, M. Poncet, L. Popa, F. Raison, J. Rhodes, M. Roncarelli, E. Rossetti, R. Saglia, P. Schneider, A. Secroun, S. Serrano, C. Sirignano, G. Sirri, J.-L. Starck, F. Sureau, A. N. Taylor, I. Tereno, R. Toledo-Moreo, E. A. Valentijn, L. Valenziano, T. Vassallo, Y. Wang, N. Welikala, A. Zacchei, J. Zoubian
Institutions: Consejo Superior de Investigaciones Científicas, Instituto de Física Teórica, Centre National de la Recherche Scientifique, Institute of Space Sciences, Université Toulouse III - Paul Sabatier, Institut d'Estudis Espacials de Catalunya, Institut de Recherche en Astrophysique et Planétologie, Université de Toulouse, University of Milan, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Osservatorio Astrofisico di Torino, University of Turin, Astronomical Observatory of Rome, National Institute for Astrophysics, University of Namur, Namur Institute for Complex Systems, UCLouvain, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Astrophysique, Instrumentation et Modélisation, University of Oslo, Universidade Federal de Sergipe, Leiden University, Leiden Observatory, Université Paris Sciences et Lettres, Observatoire de Paris, Sorbonne Université, Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères, FZU - Institute of Physics of the Czech Academy of Sciences, University College London, Queen Mary University of London, Saint Joseph University, University of Chile, Osservatorio di Astrofisica e Scienza dello Spazio, Osservatorio Astronomico di Padova, Université Paris Cité, Roma Tre University, Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, Astronomical Observatory of Capodimonte, Institute for High Energy Physics, Barcelona Institute of Science and Technology, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, University of Naples Federico II, Arcetri Astrophysical Observatory, University of Bologna, Centre National d'Études Spatiales, Royal Observatory, University of Edinburgh, University of Nottingham, European Space Agency, European Space Astronomy Centre, European Space Research Institute, Aix-Marseille Université, Institut d'Astrophysique Spatiale, University of Geneva, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, University of Sussex, Trieste Astronomical Observatory, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Max Planck Institute for Extraterrestrial Physics, Ludwig-Maximilians-Universität München, Brera Astronomical Observatory, California Institute of Technology, Jet Propulsion Laboratory, von Hoerner & Sulger (Germany), Max Planck Institute for Astronomy, Centre de physique des particules de Marseille, Institut National de Physique Nucléaire et de Physique des Particules, Institut d'Astrophysique de Paris, University of Helsinki, Helsinki Institute of Physics, Netherlands Institute for Radio Astronomy, University of Bonn, Durham University, École Polytechnique Fédérale de Lausanne, CEA Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Aarhus University, Agenzia Spaziale Italiana, Institute of Space Science - INFLPR Subsidiary, University of Padua, University of Lisbon, Institute of Astrophysics and Space Sciences, Universidad Politécnica de Cartagena, University of Groningen, Infrared Processing and Analysis Center
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Aeronautics and Space Administration, UK Research and Innovation, Ministerio de Ciencia, Innovación y Universidades, Dipartimenti di Eccellenza, European Space Agency, European Commission, Academy of Finland, Fonds De La Recherche Scientifique - FNRS, Ministero dell’Istruzione, dell’Università e della Ricerca, Agenzia Spaziale Italiana, Norges Forskningsråd, Agenția Spațială Română, Fundación Bancaria Caixa d'Estalvis i Pensions de Barcelona, Norsk Romsenter, Horizon 2020 Framework Programme, Science and Technology Facilities Council, Fundação para a Ciência e a Tecnologia, Staatssekretariat für Bildung, Forschung und Innovation
Awards: G1255325603, G1575657597, G1673643808, G1723833981, G1770719414, G2230720350, G225805931, G3067693439, G3156532051, G3660205263, G3783317134, G3946622174, G4344710914, G4424303658, G4937468798, G5099673792, G5132640529, G5329322851, G5417130124, G575684798, G6230795418, G6315092050, G6494801681, G6570372938, Enabling Weak lensing Cosmology, G7310285384, G7685134749, G7731791180, G892220529, G987940167
OpenAlex ID: W3093677088