Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

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

Martinelli, M, Martins, CJAP, Nesseris, S, Tutusaus, I, Blanchard, A, Camera, S, Carbone, C, Casas, S, Pettorino, V, Sakr, Z, Yankelevich, V, Sapone, D, Amara, A, Auricchio, N, Bodendorf, C, Bonino, D, Branchini, E, Capobianco, V, Carretero, J, Castellano, M , Cavuoti, S, Cimatti, A, Cledassou, R, Corcione, L, Costille, A, Degaudenzi, H, Douspis, M, Dubath, F, Dusini, S, Ealet, A, Ferriol, S, Frailis, M, Franceschi, E, Garilli, B, Giocoli, C, Grazian, A, Grupp, F, Haugan, SVH, Holmes, W, Hormuth, F, Jahnke, K, Kiessling, A, Kummel, M, Kunz, M, Kurki-Suonio, H, Ligori, S, Lilje, PB, Lloro, I, Mansutti, O, Marggraf, O, Markovic, K, Massey, R, Meneghetti, M, Meylan, G, Moscardini, L, Niemi, SM, Padilla, C, Paltani, S, Pasian, F, Pedersen, K, Pires, S, Poncet, M, Popa, L, Raison, F, Rebolo, R, Rhodes, J, Roncarelli, M, Rossetti, E, Saglia, R, Secroun, A, Seidel, G, Serrano, S, Sirignano, C, Sirri, G, Starck, J-L, Tavagnacco, D, Taylor, AN, Tereno, I, Toledo-Moreo, R, Valenziano, L, Wang, Y, Zamorani, G, Zoubian, J, Baldi, M, Brescia, M, Congedo, G, Conversi, L, Copin, Y, Fabbian, G, Farinelli, R, Medinaceli, E, Mei, S, Polenta, G, Romelli, E and Vassallo, T (2021) Euclid: Constraining dark energy coupled to electromagnetism using astrophysical and laboratory data. Astronomy & Astrophysics, 654. ISSN 1432-0746

Full text not available from this repository. Please see publisher or open access link below:
Open Access URL: https://doi.org/10.1051/0004-6361/202141353 (Published version)


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
Uncontrolled Keywords: Astronomy & Astrophysics; cosmological parameters; COSMOLOGY; cosmology: observations; FINE-STRUCTURE CONSTANT; GRAVITY; LIMITS; methods: data analysis; methods: statistical; Physical Sciences; QUINTESSENCE; Science & Technology; space vehicles: instruments; surveys; Science & Technology; Physical Sciences; Astronomy & Astrophysics; cosmology: observations; cosmological parameters; space vehicles: instruments; methods: data analysis; methods: statistical; surveys; FINE-STRUCTURE CONSTANT; QUINTESSENCE; COSMOLOGY; GRAVITY; LIMITS; astro-ph.CO; astro-ph.CO; 0201 Astronomical and Space Sciences; Astronomy & Astrophysics
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: EDP Sciences
SWORD Depositor: A Symplectic
Date Deposited: 12 Oct 2022 09:18
Last Modified: 12 Oct 2022 09:18
DOI or ID number: 10.1051/0004-6361/202141353
URI: https://researchonline.ljmu.ac.uk/id/eprint/17819
View Item View Item