$Euclid$ preparation: XV. Forecasting cosmological constraints for the $Euclid$ and CMB joint analysis
Abstract
The combination and cross-correlation of the upcoming 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 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 -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 -only analysis, the addition of CMB data leads to a substantial impact on constraints for all cosmological parameters of the standard -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 probes with CMB data.
Keywords
Cite
@article{arxiv.2106.08346,
title = {$Euclid$ preparation: XV. Forecasting cosmological constraints for the $Euclid$ and CMB joint analysis},
author = {Euclid Collaboration and S. Ilić and N. Aghanim and C. Baccigalupi and J. R. Bermejo-Climent and G. Fabbian and L. Legrand and D. Paoletti and M. Ballardini and M. Archidiacono and M. Douspis and F. Finelli and K. Ganga and C. Hernández-Monteagudo and M. Lattanzi and D. Marinucci and M. Migliaccio and C. Carbone and S. Casas and M. Martinelli and I. Tutusaus and P. Natoli and P. Ntelis and L. Pagano and L. Wenzl and A. Gruppuso and T. Kitching and M. Langer and N. Mauri and L. Patrizii and A. Renzi and G. Sirri and L. Stanco and M. Tenti and P. Vielzeuf and F. Lacasa and G. Polenta and V. Yankelevich and A. Blanchard and Z. Sakr and A. Pourtsidou and S. Camera and V. F. Cardone and M. Kilbinger and M. Kunz and K. Markovic and V. Pettorino and A. G. Sánchez and D. Sapone and A. Amara and N. Auricchio and R. Bender and C. Bodendorf and D. Bonino and E. Branchini and M. Brescia and J. Brinchmann and V. Capobianco and J. Carretero and F. J. Castander and M. Castellano and S. Cavuoti and A. Cimatti and R. Cledassou and G. Congedo and C. J. Conselice and L. Conversi and Y. Copin and L. Corcione and A. Costille and M. Cropper and A. Da Silva and H. Degaudenzi and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and A. Ealet and S. Farrens and P. Fosalba and M. Frailis and E. Franceschi and P. Franzetti and M. Fumana and B. Garilli and W. Gillard and B. Gillis and C. Giocoli and A. Grazian and F. Grupp and L. Guzzo and S. V. H. Haugan and H. Hoekstra and W. Holmes and F. Hormuth and P. Hudelot and K. Jahnke and S. Kermiche and A. Kiessling and R. Kohley and B. Kubik and M. Kümmel and H. Kurki-Suonio and R. Laureijs and S. Ligori and P. B. Lilje and I. Lloro and O. Mansutti and O. Marggraf and F. Marulli and R. Massey and S. Maurogordato and M. Meneghetti and E. Merlin and G. Meylan and M. Moresco and B. Morin and L. Moscardini and E. Munari and S. M. Niemi and C. Padilla and S. Paltani and F. Pasian and K. Pedersen and W. Percival and S. Pires and M. Poncet and L. Popa and L. Pozzetti and F. Raison and R. Rebolo and J. Rhodes and M. Roncarelli and E. Rossetti and R. Saglia and R. Scaramella and P. Schneider and A. Secroun and G. Seidel and S. Serrano and C. Sirignano and J. L. Starck and P. Tallada-Crespí and A. N. Taylor and I. Tereno and R. Toledo-Moreo and F. Torradeflot and E. A. Valentijn and L. Valenziano and G. A. Verdoes Kleijn and Y. Wang and N. Welikala and J. Weller and G. Zamorani and J. Zoubian and E. Medinaceli and S. Mei and C. Rosset and F. Sureau and T. Vassallo and A. Zacchei and S. Andreon and A. Balaguera-Antolínez and M. Baldi and S. Bardelli and A. Biviano and S. Borgani and E. Bozzo and C. Burigana and R. Cabanac and A. Cappi and C. S. Carvalho and G. Castignani and C. Colodro-Conde and J. Coupon and H. M. Courtois and J. Cuby and S. de la Torre and D. Di Ferdinando and H. Dole and M. Farina and P. G. Ferreira and P. Flose-Reimberg and S. Galeotta and G. Gozaliasl and J. Graciá-Carpio and E. Keihanen and C. C. Kirkpatrick and V. Lindholm and G. Mainetti and D. Maino and N. Martinet and M. Maturi and R. B. Metcalf and G. Morgante and C. Neissner and J. Nightingale and A. A. Nucita and D. Potter and G. Riccio and E. Romelli and M. Schirmer and M. Schultheis and V. Scottez and R. Teyssier and A. Tramacere and J. Valiviita and M. Viel and L. Whittaker and E. Zucca},
journal= {arXiv preprint arXiv:2106.08346},
year = {2022}
}
Comments
20 pages, 8 figures, 5 tables, 1 appendix; updated to match version accepted by journal