Please use this identifier to cite or link to this item:
|Title:||Euclid: Forecast constraints on the cosmic distance duality relation with complementary external probes||Authors:||Martinelli, M.
Martins, C. J. A. P.
Branchini, Enzo Franco
GARILLI, BIANCA MARIA ROSA
Haugan, S. V. H.
Kitching, T. D.
Lilje, P. B.
Taylor, A. N.
|Issue Date:||2020||Journal:||ASTRONOMY & ASTROPHYSICS||Number:||644||First Page:||A80||Abstract:||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. <BR /> 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. <BR /> 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. <BR /> 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 Euclid can improve current constraints by a factor of three. <BR /> Conclusions: 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. <P />This paper is published on behalf of the Euclid Consortium.||URI:||http://hdl.handle.net/20.500.12386/31236||URL:||https://www.aanda.org/articles/aa/abs/2020/12/aa39078-20/aa39078-20.html||ISSN:||0004-6361||DOI:||10.1051/0004-6361/202039078||Bibcode ADS:||2020A&A...644A..80M||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
Show full item record
Files in This Item:
|aa39078-20.pdf||PDF editoriale||1.13 MB||Adobe PDF||View/Open|
checked on Mar 29, 2023
checked on Mar 29, 2023
Items in DSpace are published in Open Access, unless otherwise indicated.