Euclid: Forecast constraints on the cosmic distance duality relation with complementary external probes

0545247 - FZÚ 2022 RIV FR eng J - Journal Article
Martinelli, M. - Martins, C.J.A.P. - Nesseris, S. - Ilić, Stephane … Total 85 authors
Euclid: Forecast constraints on the cosmic distance duality relation with complementary external probes.
Astronomy & Astrophysics. Roč. 644, Dec (2020), č. článku A80. ISSN 0004-6361. E-ISSN 1432-0746
Institutional support: RVO:68378271
Keywords : cosmology: observations * cosmological parameters / surveys * methods: data analysis * methods: statistical * space vehicles: instruments
OECD category: Particles and field physics
Impact factor: 5.803, year: 2020
Method of publishing: Limited access
https://doi.org/10.1051/0004-6361/202039078

Context. 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 to the presence of new physics.Aims. 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 0 <  z <  1.6.Methods. We start with 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.Results. 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

Permanent Link: http://hdl.handle.net/11104/0321986