Euclid: Forecast constraints on the cosmic distance duality relation with complementary external probes
Abstract
In metric theories of gravity with photon number conservation, the luminosity and angular diameter distances are related via the Etherington relation, also known as the distance-duality relation (DDR). A violation of this relation would rule out the standard cosmological paradigm and point at the presence of new physics. We quantify the ability of Euclid, in combination with contemporary surveys, to improve the current constraints on deviations from the DDR in the redshift range . We start by an analysis of the latest available data, improving previously reported constraints by a factor of 2.5. We then present a detailed analysis of simulated Euclid and external data products, using both standard parametric methods (relying on phenomenological descriptions of possible DDR violations) and a machine learning reconstruction using Genetic Algorithms. We find that for parametric methods Euclid can (in combination with external probes) improve current constraints by approximately a factor of six, while for non-parametric methods Euclid can improve current constraints by a factor of three. Our results highlight the importance of surveys like Euclid in accurately testing the pillars of the current cosmological paradigm and constraining physics beyond the standard cosmological model.
Cite
@article{arxiv.2007.16153,
title = {Euclid: Forecast constraints on the cosmic distance duality relation with complementary external probes},
author = {M. Martinelli and C. J. A. P. Martins and S. Nesseris and D. Sapone and I. Tutusaus and A. Avgoustidis and S. Camera and C. Carbone and S. Casas and S. Ilić and Z. Sakr and V. Yankelevich and N. Auricchio and A. Balestra and C. Bodendorf and D. Bonino and E. Branchini and M. Brescia and J. Brinchmann and V. Capobianco and J. Carretero and M. Castellano and S. Cavuoti and R. Cledassou and G. Congedo and L. Conversi and L. Corcione and F. Dubath and A. Ealet and M. Frailis and E. Franceschi and M. Fumana and B. Garilli and B. Gillis and C. Giocoli and F. Grupp and S. V. H. Haugan and W. Holmes and F. Hormuth and K. Jahnke and S. Kermiche and M. Kilbinger and T. D. Kitching and B. Kubik and M. Kunz and H. Kurki-Suonio and S. Ligori and P. B. Lilje and I. Lloro and O. Marggraf and K. Markovic and R. Massey and S. Mei and M. Meneghetti and G. Meylan and L. Moscardini and S. Niemi and C. Padilla and S. Paltani and F. Pasian and V. Pettorino and S. Pires and G. Polenta and M. Poncet and L. Popa and L. Pozzetti and F. Raison and J. Rhodes and M. Roncarelli and R. Saglia and P. Schneider and A. Secroun and S. Serrano and C. Sirignano and G. Sirri and F. Sureau and A. N. Taylor and I. Tereno and R. Toledo-Moreo and L. Valenziano and T. Vassallo and Y. Wang and N. Welikala and J. Weller and A. Zacchei},
journal= {arXiv preprint arXiv:2007.16153},
year = {2021}
}
Comments
13 pages, 5 figure. Version matching the version accepted by Astronomy & Astrophysics on October 5th 2020