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Euclid preparation. XV. Forecasting cosmological constraints for the Euclid and CMB joint analysis

Ilić, S. and Aghanim, N. and Baccigalupi, C. and Bermejo-Climent, J. R. and Fabbian, G. and Legrand, L. and Paoletti, D. and Ballardini, M. and Archidiacono, M. and Douspis, M. and Finelli, F. and Ganga, K. and Hernández-Monteagudo, C. and Lattanzi, M. and Marinucci, D. and Migliaccio, M. and Carbone, C. and Casas, S. and Martinelli, M. and Tutusaus, I. and Natoli, P. and Ntelis, P. and Pagano, L. and Wenzl, L. and Gruppuso, A. and Kitching, T. and Langer, M. and Mauri, N. and Patrizii, L. and Renzi, A. and Sirri, G. and Stanco, L. and Tenti, M. and Vielzeuf, P. and Lacasa, F. and Polenta, G. and Yankelevich, V. and Blanchard, A. and Sakr, Z. and Pourtsidou, A. and Camera, S. and Cardone, V. F. and Kilbinger, M. and Kunz, M. and Markovic, K. and Pettorino, V. and Sánchez, A. G. and Sapone, D. and Amara, A. and Auricchio, N. and Bender, R. and Bodendorf, C. and Bonino, D. and Branchini, E. and Brescia, M. and Brinchmann, J. and Capobianco, V. and Carretero, J. and Castander, F. J. and Castellano, M. and Cavuoti, S. and Cimatti, A. and Cledassou, R. and Congedo, G. and Conselice, C. J. and Conversi, L. and Copin, Y. and Corcione, L. and Costille, A. and Cropper, M. and Da Silva, A. and Degaudenzi, H. and Dubath, F. and Duncan, C. A. J. and Dupac, X. and Dusini, S. and Ealet, A. and Farrens, S. and Fosalba, P. and Frailis, M. and Franceschi, E. and Franzetti, P. and Fumana, M. and Garilli, B. and Gillard, W. and Gillis, B. and Giocoli, C. and Grazian, A. and Grupp, F. and Guzzo, L. and Haugan, S. V. H. and Hoekstra, H. and Holmes, W. and Hormuth, F. and Hudelot, P. and Jahnke, K. and Kermiche, S. and Kiessling, A. and Kohley, R. and Kubik, B. and Kümmel, M. and Kurki-Suonio, H. and Laureijs, R. and Ligori, S. and Lilje, P. B. and Lloro, I. and Mansutti, O. and Marggraf, O. and Marulli, F. and Massey, R. and Maurogordato, S. and Meneghetti, M. and Merlin, E. and Meylan, G. and Moresco, M. and Morin, B. and Moscardini, L. and Munari, E. and Niemi, S. M. and Padilla, C. and Paltani, S. and Pasian, F. and Pedersen, K. and Percival, W. and Pires, S. and Poncet, M. and Popa, L. and Pozzetti, L. and Raison, F. and Rebolo, R. and Rhodes, J. and Roncarelli, M. and Rossetti, E. and Saglia, R. and Scaramella, R. and Schneider, P. and Secroun, A. and Seidel, G. and Serrano, S. and Sirignano, C. and Starck, J. L. and Tallada-Crespí, P. and Taylor, A. N. and Tereno, I. and Toledo-Moreo, R. and Torradeflot, F. and Valentijn, E. A. and Valenziano, L. and Verdoes Kleijn, G. A. and Wang, Y. and Welikala, N. and Weller, J. and Zamorani, G. and Zoubian, J. and Medinaceli, E. and Mei, S. and Rosset, C. and Sureau, F. and Vassallo, T. and Zacchei, A. and Andreon, S. and Balaguera-Antolínez, A. and Baldi, M. and Bardelli, S. and Biviano, A. and Borgani, S. and Bozzo, E. and Burigana, C. and Cabanac, R. and Cappi, A. and Carvalho, C. S. and Castignani, G. and Colodro-Conde, C. and Coupon, J. and Courtois, H. M. and Cuby, J. and de la Torre, S. and Di Ferdinando, D. and Dole, H. and Farina, M. and Ferreira, P. G. and Flose-Reimberg, P. and Galeotta, S. and Gozaliasl, G. and Graciá-Carpio, J. and Keihanen, E. and Kirkpatrick, C. C. and Lindholm, V. and Mainetti, G. and Maino, D. and Martinet, N. and Maturi, M. and Metcalf, R. B. and Morgante, G. and Neissner, C. and Nightingale, J. and Nucita, A. A. and Potter, D. and Riccio, G. and Romelli, E. and Schirmer, M. and Schultheis, M. and Scottez, V. and Teyssier, R. and Tramacere, A. and Valiviita, J. and Viel, M. and Whittaker, L. and Zucca, E. (2022) Euclid preparation. XV. Forecasting cosmological constraints for the Euclid and CMB joint analysis. Astronomy and Astrophysics, 657 . Art. No. A91. ISSN 0004-6361. doi:10.1051/0004-6361/202141556.

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The combination and cross-correlation of the upcoming Euclid data with cosmic microwave background (CMB) measurements is a source of great expectation since it will provide the largest lever arm of epochs, ranging from recombination to structure formation across the entire past light cone. In this work, we present forecasts for the joint analysis of Euclid and CMB data on the cosmological parameters of the standard cosmological model and some of its extensions. This work expands and complements the recently published forecasts based on Euclid-specific probes, namely galaxy clustering, weak lensing, and their cross-correlation. With some assumptions on the specifications of current and future CMB experiments, the predicted constraints are obtained from both a standard Fisher formalism and a posterior-fitting approach based on actual CMB data. Compared to a Euclid-only analysis, the addition of CMB data leads to a substantial impact on constraints for all cosmological parameters of the standard Λ-cold-dark-matter model, with improvements reaching up to a factor of ten. For the parameters of extended models, which include a redshift-dependent dark energy equation of state, non-zero curvature, and a phenomenological modification of gravity, improvements can be of the order of two to three, reaching higher than ten in some cases. The results highlight the crucial importance for cosmological constraints of the combination and cross-correlation of Euclid probes with CMB data.

Item Type:Article
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URLURL TypeDescription Paper
Meneghetti, M.0000-0003-1225-7084
Rhodes, J.0000-0002-4485-8549
Alternate Title:Euclid preparation: XV. Forecasting cosmological constraints for the Euclid and CMB joint analysis
Additional Information:© Euclid Collaboration 2022. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Received: 15 June 2021 Accepted: 3 September 2021. The Euclid Consortium acknowledges the European Space Agency and a number of agencies and institutes that have supported the development of Euclid, in particular the Academy of Finland, the Agenzia Spaziale Italiana, the Belgian Science Policy, the Canadian Euclid Consortium, the Centre National d’Etudes Spatiales, the Deutsches Zentrum für Luft-und Raumfahrt, the Danish Space Research Institute, the Fundação para a Ciência e a Tecnologia, the Ministerio de Economia y Competitividad, the National Aeronautics and Space Administration, the Netherlandse Onderzoekschool Voor Astronomie, the Norwegian Space Agency, the Romanian Space Agency, the State Secretariat for Education, Research and Innovation (SERI) at the Swiss Space Office (SSO), and the United Kingdom Space Agency. A complete and detailed list is available on the Euclid web site ( Marco Baldi acknowledges support by the project ‘Combining Cosmic Microwave Background and Large Scale Structure data: an Integrated Approach for Addressing Fundamental Questions in Cosmology’, funded by the PRIN-MIUR 2017 grant 2017YJYZAH. Jose R. Bermejo-Climent is supported by an INAF fellowship under the agreement INAF-IAC. Mario Ballardini, Jose R. Bermejo-Climent, Fabio Finelli acknowledge financial contribution from the contract ASI/INAF for the Euclid mission n.2018-23-HH.0. DP, Fabio Finelli acknowledge financial support by ASI Grant 2016-24-H.0 and the agreement n.2020-9-HH.0 ASI-UniRM2 ‘Partecipazione italiana alla fase A della missione LiteBIRD’. The SISSA group acknowledges support by the ASI/INAF contracts Euclid-IC (I/031/10/0), ASI-COSMOS (, ASI-LiteBIRD contracts, the INDARK INFN Initiative (, and the MIUR PRIN 2015 grant ‘Cosmology and Fundamental Physics: illuminating the Dark Universe with Euclid’. Giulio Fabbian acknowledges the support of the European Research Council under the Marie Skłodowska Curie actions through the Individual Global Fellowship No. 892401 PiCOGAMBAS. Stéphane Ilić acknowledges financial support from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007-2013)/ERC Grant Agreement No. 617656 ‘Theories and Models of the Dark Sector: Dark Matter, Dark Energy and Gravity. Louis Legrand acknowledges support from CNES’s funding of the Euclid project and a SNSF Eccellenza Professorial Fellowship (No. 186879). Domenico Marinucci acknowledges support from the MIUR Excellence Project awarded to the Department of Mathematics, Università di Roma Tor Vergata, CUP E83C18000100006. Marina Migliaccio was supported by the program for young researchers ‘Rita Levi Montalcini’ year 2015. Alessandro Renzi was supported by the project ‘Combining Cosmic Microwave Background and Large Scale Structure data: an Integrated Approach for Addressing Fundamental Questions in Cosmology’, funded by the MIUR Progetti di Rilevante Interesse Nazionale (PRIN) Bando 2017 – grant 2017YJYZAH; and acknowledges funding from Italian Ministry of Education, University and Research (MIUR) through the ‘Dipartimenti di eccellenza’ project Science of the Universe. Stefano Camera acknowledges support from the ‘Departments of Excellence 2018-2022’ Grant (L. 232/2016) awarded by the Italian Ministry of University and Research (MUR). Matteo Martinelli acknowledges support from the Centro de Excelencia Severo Ochoa Program SEV-2016-059 and from ‘la Caixa’ Foundation (ID 100010434), with fellowship code LCF/BQ/PI19/11690015. Alkistis Pourtsidou is a UK Research and Innovation Future Leaders Fellow, grant MR/S016066/1. Ziad Sakr acknowledges support from the IRAP and IN2P3 Lyon computing centers. Domenico Sapone acknowledges financial support from Fondecyt Regular project number 1200171. Isaac Tutusaus acknowledges support from the Spanish Ministry of Science, Innovation and Universities through grant ESP2017-89838, and the H2020 programme of the European Commission through grant 776247. Victoria Yankelevich acknowledges funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 769130).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
European Space Agency (ESA)UNSPECIFIED
Academy of FinlandUNSPECIFIED
Agenzia Spaziale Italiana (ASI)2018-23-HH.0
Belgian Federal Science Policy Office (BELSPO)UNSPECIFIED
Canadian Euclid ConsortiumUNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Deutsches Zentrum für Luft-und Raumfahrt (DLR)UNSPECIFIED
Danish Space Research InstituteUNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)UNSPECIFIED
Ministerio de Economia y Competitividad (MINECO)UNSPECIFIED
Nederlandse Onderzoekschool voor de Astronomie (NOVA)UNSPECIFIED
Norwegian Space AgencyUNSPECIFIED
Romanian Space AgencyUNSPECIFIED
Swiss Space Office (SSO)UNSPECIFIED
United Kingdom Space Agency (UKSA)UNSPECIFIED
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)2017YJYZAH
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)2016-24-H.0
Agenzia Spaziale Italiana (ASI)2020-9-HH.0
Agenzia Spaziale Italiana (ASI)I/031/10/0
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Marie Curie Fellowship892401
European Research Council (ERC)617656
Swiss National Science Foundation (SNSF)186879
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)CUP E83C18000100006
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)232/2016
Centro de Excelencia Severo OchoaSEV-2016-059
La Caixa Foundation100010434
La Caixa FoundationLCF/BQ/PI19/11690015
UK Research and InnovationMR/S016066/1
Institut de Recherche en Astrophysique et PlanétologieUNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)UNSPECIFIED
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1200171
Ministerio de Ciencia, Innovación y Universidades (MICIU)ESP2017-89838
European Research Council (ERC)776247
European Research Council (ERC)769130
Subject Keywords:large-scale structure of Universe / cosmic background radiation / surveys / methods: statistical
Record Number:CaltechAUTHORS:20220204-680022000
Persistent URL:
Official Citation:Euclid preparation - XV. Forecasting cosmological constraints for the Euclid and CMB joint analysis Euclid Collaboration, S. Ilić, N. Aghanim, C. Baccigalupi, J. R. Bermejo-Climent, G. Fabbian, L. Legrand, D. Paoletti, M. Ballardini, M. Archidiacono, M. Douspis, F. Finelli, K. Ganga, C. Hernández-Monteagudo, M. Lattanzi, D. Marinucci, M. Migliaccio, C. Carbone, S. Casas, M. Martinelli, I. Tutusaus, P. Natoli, P. Ntelis, L. Pagano, L. Wenzl, A. Gruppuso, T. Kitching, M. Langer, N. Mauri, L. Patrizii, A. Renzi, G. Sirri, L. Stanco, M. Tenti, P. Vielzeuf, F. Lacasa, G. Polenta, V. Yankelevich, A. Blanchard, Z. Sakr, A. Pourtsidou, S. Camera, V. F. Cardone, M. Kilbinger, M. Kunz, K. Markovic, V. Pettorino, A. G. Sánchez, D. Sapone, A. Amara, N. Auricchio, R. Bender, C. Bodendorf, D. Bonino, E. Branchini, M. Brescia, J. Brinchmann, V. Capobianco, J. Carretero, F. J. Castander, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, C. J. Conselice, L. Conversi, Y. Copin, L. Corcione, A. Costille, M. Cropper, A. Da Silva, H. Degaudenzi, F. Dubath, C. A. J. Duncan, X. Dupac, S. Dusini, A. Ealet, S. Farrens, P. Fosalba, M. Frailis, E. Franceschi, P. Franzetti, M. Fumana, B. Garilli, W. Gillard, B. Gillis, C. Giocoli, A. Grazian, F. Grupp, L. Guzzo, S. V. H. Haugan, H. Hoekstra, W. Holmes, F. Hormuth, P. Hudelot, K. Jahnke, S. Kermiche, A. Kiessling, R. Kohley, B. Kubik, M. Kümmel, H. Kurki-Suonio, R. Laureijs, S. Ligori, P. B. Lilje, I. Lloro, O. Mansutti, O. Marggraf, F. Marulli, R. Massey, S. Maurogordato, M. Meneghetti, E. Merlin, G. Meylan, M. Moresco, B. Morin, L. Moscardini, E. Munari, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. Percival, S. Pires, M. Poncet, L. Popa, L. Pozzetti, F. Raison, R. Rebolo, J. Rhodes, M. Roncarelli, E. Rossetti, R. Saglia, R. Scaramella, P. Schneider, A. Secroun, G. Seidel, S. Serrano, C. Sirignano, J. L. Starck, P. Tallada-Crespí, A. N. Taylor, I. Tereno, R. Toledo-Moreo, F. Torradeflot, E. A. Valentijn, L. Valenziano, G. A. Verdoes Kleijn, Y. Wang, N. Welikala, J. Weller, G. Zamorani, J. Zoubian, E. Medinaceli, S. Mei, C. Rosset, F. Sureau, T. Vassallo, A. Zacchei, S. Andreon, A. Balaguera-Antolínez, M. Baldi, S. Bardelli, A. Biviano, S. Borgani, E. Bozzo, C. Burigana, R. Cabanac, A. Cappi, C. S. Carvalho, G. Castignani, C. Colodro-Conde, J. Coupon, H. M. Courtois, J. Cuby, S. de la Torre, D. Di Ferdinando, H. Dole, M. Farina, P. G. Ferreira, P. Flose-Reimberg, S. Galeotta, G. Gozaliasl, J. Graciá-Carpio, E. Keihanen, C. C. Kirkpatrick, V. Lindholm, G. Mainetti, D. Maino, N. Martinet, M. Maturi, R. B. Metcalf, G. Morgante, C. Neissner, J. Nightingale, A. A. Nucita, D. Potter, G. Riccio, E. Romelli, M. Schirmer, M. Schultheis, V. Scottez, R. Teyssier, A. Tramacere, J. Valiviita, M. Viel, L. Whittaker and E. Zucca A&A, 657 (2022) A91 DOI:
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ID Code:113290
Deposited By: George Porter
Deposited On:07 Feb 2022 23:41
Last Modified:07 Feb 2022 23:41

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