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Euclid: Constraining dark energy coupled to electromagnetism using astrophysical and laboratory data

Martinelli, M. and Martins, C. J. A. P. and Nesseris, S. and Tutusaus, I. and Blanchard, A. and Camera, S. and Carbone, C. and Casas, S. and Pettorino, V. and Sakr, Z. and Yankelevich, V. and Sapone, D. and Amara, A. and Auricchio, N. and Bodendorf, C. and Bonino, D. and Branchini, E. and Capobianco, V. and Carretero, J. and Castellano, M. and Cavuoti, S. and Cimatti, A. and Cledassou, R. and Corcione, L. and Costille, A. and Degaudenzi, H. and Douspis, M. and Dubath, F. and Dusini, S. and Ealet, A. and Ferriol, S. and Frailis, M. and Franceschi, E. and Garilli, B. and Giocoli, C. and Grazian, A. and Grupp, F. and Haugan, S. V. H. and Holmes, W. and Hormuth, F. and Jahnke, K. and Kiessling, A. and Kümmel, M. and Kunz, M. and Kurki-Suonio, H. and Ligori, S. and Lilje, P. B. and Lloro, I. and Mansutti, O. and Marggraf, O. and Markovic, K. and Massey, R. and Meneghetti, M. and Meylan, G. and Moscardini, L. and Niemi, S. M. and Padilla, C. and Paltani, S. and Pasian, F. and Pedersen, K. and Pires, S. and Poncet, M. and Popa, L. and Raison, F. and Rebolo, R. and Rhodes, J. and Roncarelli, M. and Rossetti, E. and Saglia, R. and Secroun, A. and Seidel, G. and Serrano, S. and Sirignano, C. and Sirri, G. and Starck, J.-L. and Tavagnacco, D. and Taylor, A. N. and Tereno, I. and Toledo-Moreo, R. and Valenziano, L. and Wang, Y. and Zamorani, G. and Zoubian, J. and Baldi, M. and Brescia, M. and Congedo, G. and Conversi, L. and Copin, Y. and Fabbian, G. and Farinelli, R. and Medinaceli, E. and Mei, S. and Polenta, G. and Romelli, E. and Vassallo, T. (2021) Euclid: Constraining dark energy coupled to electromagnetism using astrophysical and laboratory data. Astronomy & Astrophysics, 654 . Art. No. A148. ISSN 0004-6361. doi:10.1051/0004-6361/202141353.

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In physically realistic, scalar-field-based dynamical dark energy models (including, e.g., quintessence), one naturally expects the scalar field to couple to the rest of the model’s degrees of freedom. In particular, a coupling to the electromagnetic sector leads to a time (redshift) dependence in the fine-structure constant and a violation of the weak equivalence principle. Here we extend the previous Euclid forecast constraints on dark energy models to this enlarged (but physically more realistic) parameter space, and forecast how well Euclid, together with high-resolution spectroscopic data and local experiments, can constrain these models. Our analysis combines simulated Euclid data products with astrophysical measurements of the fine-structure constant, α, and local experimental constraints, and it includes both parametric and non-parametric methods. For the astrophysical measurements of α, we consider both the currently available data and a simulated dataset representative of Extremely Large Telescope measurements that are expected to be available in the 2030s. Our parametric analysis shows that in the latter case, the inclusion of astrophysical and local data improves the Euclid dark energy figure of merit by between 8% and 26%, depending on the correct fiducial model, with the improvements being larger in the null case where the fiducial coupling to the electromagnetic sector is vanishing. These improvements would be smaller with the current astrophysical data. Moreover, we illustrate how a genetic algorithms based reconstruction provides a null test for the presence of the coupling. Our results highlight the importance of complementing surveys like Euclid with external data products, in order to accurately test the wider parameter spaces of physically motivated paradigms.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Rhodes, J.0000-0002-4485-8549
Wang, Y.0000-0002-4749-2984
Additional Information:© ESO 2021. Article published by EDP Sciences. Received 20 May 2021; Accepted 19 August 2021; Published online 26 October 2021. This paper is published on behalf of the Euclid Consortium. MM has received the support of a fellowship from “la Caixa” Foundation (ID 100010434), with fellowship code LCF/BQ/PI19/11690015, and the support of the Centro de Excelencia Severo Ochoa Program SEV-2016-059. The work of CJM was financed by FEDER – Fundo Europeu de Desenvolvimento Regional funds through the COMPETE 2020 – Operational Programme for Competitiveness and Internationalisation (POCI), and by Portuguese funds through FCT – Fundação para a Ciência e a Tecnologia in the framework of the project POCI-01-0145-FEDER-028987. IT 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. SN acknowledges support from the research project PGC2018-094773-B-C32, the Centro de Excelencia Severo Ochoa Program SEV-2016-059 and the Ramón y Cajal program through Grant No. RYC-2014-15843. 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 Fundaçáo 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 (
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
La Caixa Foundation100010434
La Caixa FoundationLCF/BQ/PI19/11690015
Centro de Excelencia Severo OchoaSEV-2016-059
Fundação para a Ciência e a Tecnologia (FCT)POCI-01-0145-FEDER-028987
Ministerio de Ciencia, Innovación y Universidades (MICIU)ESP2017-89838
European Research Council (ERC)776247
Fondo Europeo de Desarrollo Regional (FEDER)PGC2018-094773-B-C32
Ramón y Cajal ProgrammeRYC-2014-15843
European Space Agency (ESA)UNSPECIFIED
Academy of FinlandUNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
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
Ministerio de Economía y Competitividad (MINECO)UNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
Norwegian Space AgencyUNSPECIFIED
Romanian Space AgencyUNSPECIFIED
State Secretariat for Research, Development and Innovation (SEIDI)UNSPECIFIED
Swiss Space Office (SSO)UNSPECIFIED
United Kingdom Space Agency (UKSA)UNSPECIFIED
Subject Keywords:cosmology: observations – cosmological parameters – space vehicles: instruments – methods: data analysis – methods: statistical – surveys
Record Number:CaltechAUTHORS:20211105-151438182
Persistent URL:
Official Citation:Euclid: Constraining dark energy coupled to electromagnetism using astrophysical and laboratory data. M. Martinelli, C. J. A. P. Martins, S. Nesseris, I. Tutusaus, A. Blanchard, S. Camera, C. Carbone, S. Casas, V. Pettorino, Z. Sakr, V. Yankelevich, D. Sapone, A. Amara, N. Auricchio, C. Bodendorf, D. Bonino, E. Branchini, V. Capobianco, J. Carretero, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, L. Corcione, A. Costille, H. Degaudenzi, M. Douspis, F. Dubath, S. Dusini, A. Ealet, S. Ferriol, M. Frailis, E. Franceschi, B. Garilli, C. Giocoli, A. Grazian, F. Grupp, S. V. H. Haugan, W. Holmes, F. Hormuth, K. Jahnke, A. Kiessling, M. Kümmel, M. Kunz, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I. Lloro, O. Mansutti, O. Marggraf, K. Markovic, R. Massey, M. Meneghetti, G. Meylan, L. Moscardini, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, S. Pires, M. Poncet, L. Popa, F. Raison, R. Rebolo, J. Rhodes, M. Roncarelli, E. Rossetti, R. Saglia, A. Secroun, G. Seidel, S. Serrano, C. Sirignano, G. Sirri, J.-L. Starck, D. Tavagnacco, A. N. Taylor, I. Tereno, R. Toledo-Moreo, L. Valenziano, Y. Wang, G. Zamorani, J. Zoubian, M. Baldi, M. Brescia, G. Congedo, L. Conversi, Y. Copin, G. Fabbian, R. Farinelli, E. Medinaceli, S. Mei, G. Polenta, E. Romelli and T. Vassallo. A&A, 654 (2021) A148; DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:111760
Deposited By: Tony Diaz
Deposited On:05 Nov 2021 19:27
Last Modified:05 Nov 2021 19:27

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