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Constraining modified gravitational theories by weak lensing with Euclid

Martinelli, Matteo, Calabrese, Erminia ORCID:, 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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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

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