Constraining modified gravitational theories by weak lensing with Euclid

Martinelli, Matteo, Calabrese, Erminia ORCID: https://orcid.org/0000-0003-0837-0068, De Bernardis, Francesco, Melchiorri, Alessandro, Pagano, Luca and Scaramella, Roberto 2011. Constraining modified gravitational theories by weak lensing with Euclid. Physical Review D 83 (2) , 023012. 10.1103/PhysRevD.83.023012

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Abstract

Future proposed satellite missions such as Euclid can offer the opportunity to test general relativity on cosmic scales through mapping of the galaxy weak-lensing signal. In this paper we forecast the ability of these experiments to constrain modified gravity scenarios such as those predicted by scalar-tensor and f(R) theories. We find that Euclid will improve constraints expected from the Planck satellite on these modified theories of gravity by 2 orders of magnitude. We discuss parameter degeneracies and the possible biases introduced by modifications to gravity.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	American Physical Society
ISSN:	1550-7998
Date of First Compliant Deposit:	10 October 2017
Date of Acceptance:	21 December 2010
Last Modified:	04 May 2023 02:18
URI:	https://orca.cardiff.ac.uk/id/eprint/105354

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