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Lookup NU author(s): Dr James Nightingale
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© The Authors 2025. The Euclid mission of the European Space Agency will provide weak gravitational lensing and galaxy clustering surveys that can be used to constrain the standard cosmological model and its extensions, with an opportunity to test the properties of dark matter beyond the minimal cold dark matter paradigm. We present forecasts from the combination of the Euclid weak lensing and photometric galaxy clustering data on the parameters describing four interesting and representative non-minimal dark matter models: a mixture of cold and warm dark matter relics; unstable dark matter decaying either into massless or massive relics; and dark matter undergoing feeble interactions with relativistic relics. We modelled these scenarios at the level of the non-linear matter power spectrum using emulators trained on dedicated N-body simulations. We used a mock Euclid likelihood and Monte Carlo Markov chains to fit mock data and infer error bars on dark matter parameters marginalised over other parameters. We find that the Euclid photometric probe (alone or in combination with cosmic microwave background data from the Planck satellite) will be sensitive to the effect of each of the four dark matter models considered here. The improvement will be particularly spectacular for decaying and interacting dark matter models. With Euclid, the bounds on some dark matter parameters can improve by up to two orders of magnitude compared to current limits. We discuss the dependence of predicted uncertainties on different assumptions: the inclusion of photometric galaxy clustering data, the minimum angular scale taken into account, and modelling of baryonic feedback effects. We conclude that the Euclid mission will be able to measure quantities related to the dark sector of particle physics with unprecedented sensitivity. This will provide important information for model building in high-energy physics. Any hint of a deviation from the minimal cold dark matter paradigm would have profound implications for cosmology and particle physics.
Author(s): Lesgourgues J, Schwagereit J, Bucko J, Parimbelli G, Giri SK, Hervas-Peters F, Schneider A, Archidiacono M, Pace F, Sakr Z, Amara A, Amendola L, Andreon S, Auricchio N, Aussel H, Baldi M, Bardelli S, Bender R, Bodendorf C, Bonino D, Branchini E, Brescia M, Brinchmann J, Camera S, Capobianco V, Carbone C, Cardone VF, Carretero J, Casas S, Castellano M, Cavuoti S, Cimatti A, Congedo G, Conselice CJ, Conversi L, Copin Y, Courbin F, Courtois HM, Da Silva A, Degaudenzi H, Di Giorgio AM, Douspis M, Dubath F, Dupac X, Dusini S, Farina M, Farrens S, Ferriol S, Fosalba P, Frailis M, Franceschi E, Fumana M, Galeotta S, Gillis B, Giocoli C, Grazian A, Grupp F, Guzzo L, Haugan SVH, Hoekstra H, Holmes W, Hook I, Hormuth F, Hornstrup A, Jahnke K, Joachimi B, Keihanen E, Kermiche S, Kiessling A, Kubik B, Kunz M, Kurki-Suonio H, Laureijs R, Ligori S, Lilje PB, Lindholm V, Lloro I, Maino D, Maiorano E, Mansutti O, Marggraf O, Markovic K, Martinet N, Marulli F, Massey R, Medinaceli E, Mei S, Mellier Y, Meneghetti M, Merlin E, Meylan G, Moresco M, Moscardini L, Munari E, Nakajima R, Niemi S-M, Nightingale JW, Padilla C, Paltani S, Pasian F, Pedersen K, Percival WJ, Pettorino V, Polenta G, Poncet M, Popa LA, Raison F, Rebolo R, Renzi A, Rhodes J, Riccio G, Romelli E, Roncarelli M, Saglia R, Sapone D, Sartoris B, Scaramella R, Schneider P, Schrabback T, Secroun A, Seidel G, Serrano S, Sirignano C, Sirri G, Stanco L, Tallada-Crespi P, Tereno I, Toledo-Moreo R, Torradeflot F, Tutusaus I, Valenziano L, Vassallo T, Veropalumbo A, Wang Y, Weller J, Zamorani G, Zucca E, Biviano A, Boucaud A, Bozzo E, Burigana C, Calabrese M, Colodro-Conde C, De Lucia G, Di Ferdinando D, Escartin Vigo JA, Fabbian G, Farinelli R, Gracia-Carpio J, Ilic S, Mainetti G, Martinelli M, Mauri N, Neissner C, Nucita AA, Scottez V, Tenti M, Viel M, Wiesmann M, Akrami Y, Anselmi S, Baccigalupi C, Ballardini M, Bertacca D, Blot L, Bohringer H, Borgani S, Bruton S, Cabanac R, Calabro A, Cappi A, Carvalho CS, Castignani G, Castro T, Chambers KC, Contarini S, Cooray AR, Davini S, De Caro B, De La Torre S, Desprez G, Diaz-Sanchez A, Di Domizio S, Dole H, Escoffier S, Ferrari AG, Ferreira PG, Ferrero I, Finelli F, Fornari F, Gabarra L, Ganga K, Garcia-Bellido J, Gaztanaga E, Giacomini F, Gozaliasl G, Hildebrandt H, Hjorth J, Jimenez Munnoz A, Joudaki S, Kajava JJE, Kansal V, Karagiannis D, Kirkpatrick CC, Legrand L, Libet G, Loureiro A, Macias-Perez J, Maggio G, Magliocchetti M, Mannucci F, Maoli R, Martins CJAP, Matthew S, Maurin L, Metcalf RB, Migliaccio M, Monaco P, Moretti C, Morgante G, Nadathur S, Walton NA, Patrizii L, Pezzotta A, Pontinen M, Popa V, Porciani C, Potter D, Reimberg P, Risso I, Rocci P-F, Sahlen M, Sanchez AG, Schewtschenko JA, Sefusatti E, Sereno M, Simon P, Spurio Mancini A, Steinwagner J, Tao C, Tessore N, Testera G, Teyssier R, Toft S, Tosi S, Troja A, Tucci M, Valieri C, Valiviita J, Vergani D, Verza G
Publication type: Article
Publication status: Published
Journal: Astronomy and Astrophysics
Year: 2025
Volume: 693
Online publication date: 22/01/2025
Acceptance date: 18/10/2024
Date deposited: 18/02/2025
ISSN (print): 0004-6361
ISSN (electronic): 1432-0746
Publisher: EDP Sciences
URL: https://doi.org/10.1051/0004-6361/202451611
DOI: 10.1051/0004-6361/202451611
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