Open Access BASE2020

Euclid preparation VII. Forecast validation for Euclid cosmological probes

Blanchard, A; Camera, S; Carbone, C; Cardone, V. F; Casas, S; Clesse, S; Ilic, S; Kilbinger, M; Kitching, T; Kunz, M; Lacasa, F; Linder, E; Majerotto, E; Markovic, K; Martinelli, M; Pettorino, V; Pourtsidou, A; Sakr, Z; Sánchez, A. G; Sapone, D; Tutusaus, I; Yahia-Cherif, S; Yankelevich, V; Andreon, S; Aussel, H; Balaguera-Antolinez, A; Baldi, M; Bardelli, S; Bender, R; Biviano, A; Bonino, D; Boucaud, A; Bozzo, E; Branchini, E; Brau Nogue, S; Brescia, M; Brinchmann, J; Burigana, C; Cabanac, R; Capobianco, V; Cappi, A; Carretero, J; Carvalho, C.S; Casas, R; Castander, F. J; Castellano, M; Cavuoti, S; Cimatti, A; Cledassou, R; Colodro Conde, C; Congedo, G; Conselice, C.J; Conversi, L; Copin, Y; Corcione, L; Coupon, J; Courtois, H. M; Cropper, M; Da Silva, A; de la Torre, S; Di Ferdinando, D; Dubath, F; Ducret, F; Duncan, C. A. J; Dupac, X; Dusini, S; Fabbian, G; Fabricius, M; Farrens, S; Fosalba, P; Fotopoulou, S; Fourmanoit, N; Frailis, M; Franceschi, E; Franzetti, P; Fumana, M; Galeotta, S; Gillard, W; Gillis, B; Giocoli, C; Gómez-Álvarez, P; Gracia Carpio, J; Grupp, F; Guzzo, L; Hoekstra, H; Hormuth, F; Israel, H; Jahnke, K; Keihanen, E; Kermiche, S; Kirkpatrick, C. C; Kohley, R; Kubik, B; Kurki-Suonio, H; Ligori, S; Lilje, P. B; Lloro, I; Maino, D; Maiorano, E; Marggraf, O; Martinet, N; Marulli, F; Massey, R; Medinaceli, E; Mei, S; Mellier, Y; Metcalf, B; Metge, J.J; Meylan, G; Moresco, M; Moscardini, L; Munari, E; Nichol, R. C; Niemi, S; Nucita, A.A; Padilla, C; Paltani, S; Pasian, F; Percival, W. J; Pires, S; Polenta, G; Poncet, M; Pozzetti, L; Racca, G.D; Raison, F; Renzi, A; Rhodes, J; Romelli, E; Roncarelli, M; Rossetti, E; Saglia, R; Schneider, P; Scottez, V; Secroun, A; Sirri, G; Stanco, L; Starck, J. L; Sureau, F; Tallada Crespi, P; Tavagnacco, D; Taylor, A. N; Tenti, M; Tereno, I; Toledo Moreo, R; Torradeflot, F; Valenziano, L; Vassallo, T; Kleijn, G. A. Verdoes; Viel, M; Wang, Y; Zacchei, A; Zoubian, J; Zucca, E

Zugriff(Open Access)

Abstract

Aims. The Euclid space telescope will measure the shapes and redshifts of galaxies to reconstruct the expansion history of the Universe and the growth of cosmic structures. The estimation of the expected performance of the experiment, in terms of predicted constraints on cosmological parameters, has so far relied on various individual methodologies and numerical implementations, which were developed for different observational probes and for the combination thereof. In this paper we present validated forecasts, which combine both theoretical and observational ingredients for different cosmological probes. This work is presented to provide the community with reliable numerical codes and methods for Euclid cosmological forecasts.Methods. We describe in detail the methods adopted for Fisher matrix forecasts, which were applied to galaxy clustering, weak lensing, and the combination thereof. We estimated the required accuracy for Euclid forecasts and outline a methodology for their development. We then compare and improve different numerical implementations, reaching uncertainties on the errors of cosmological parameters that are less than the required precision in all cases. Furthermore, we provide details on the validated implementations, some of which are made publicly available, in different programming languages, together with a reference training-set of input and output matrices for a set of specific models. These can be used by the reader to validate their own implementations if required.Results. We present new cosmological forecasts for Euclid. We find that results depend on the specific cosmological model and remaining freedom in each setting, for example flat or non-flat spatial cosmologies, or different cuts at non-linear scales. The numerical implementations are now reliable for these settings. We present the results for an optimistic and a pessimistic choice for these types of settings. We demonstrate that the impact of cross-correlations is particularly relevant for models beyond a cosmological constant and may allow us to increase the dark energy figure of merit by at least a factor of three. ; Academy of Finland European Commission Agenzia Spaziale Italiana (ASI) Belgian Federal Science Policy Office Canadian Euclid Consortium Centre National D'etudes Spatiales Deutsches Zentrum fur Luft-and Raumfahrt Danish Space Research Institute Fundacao para a Cienca e a Tecnologia Spanish Government National Aeronautics & Space Administration (NASA) 80NM0018D0004 Netherlandse Onderzoekschool Voor Astronomie Norvegian Space Center Romanian Space Agency State Secretariat for Education, Research and Innovation (SERI) at the Swiss Space O ffice (SSO) United Kingdom Space Agency Ministry of Education, Universities and Research (MIUR) Ministry of Education, Universities and Research (MIUR) L. 232/2016 European Research Council through the Darklight Advanced Research Grant 291521 Ministry of Education, Universities and Research (MIUR) Centre National D'etudes Spatiales Fonds de la Recherche Scientifique - FNRS Swiss National Science Foundation (SNSF) European Commission NASA ROSES grant 12-EUCLID12-0004 UK Science & Technology Facilities Council ST/N000668/1 ST/S000437/1 UK Space Agency ST/N00180X/1 D-ITP consortium, a program of the NWO - the OCW Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 1200171 Spanish Ministry of Science, Innovation and Universities ESP2017-89838-C3-1-R H2020 programme of the European Commission 776247 German Research Foundation (DFG) Transregio 33 International Max Planck Research School for Astronomy and Astrophysics at the University of Bonn International Max Planck Research School for Astronomy and Astrophysics at the University of Cologne Bonn-Cologne Graduate School for Physics and Astronomy Royal Society of London European Research Council (ERC) 617656