Constraining modified gravitational theories by weak lensing with Euclid

Matteo Martinelli, Erminia Calabrese, Francesco De Bernardis, Alessandro Melchiorri, Luca Pagano, and Roberto Scaramella
Phys. Rev. D 83, 023012 – Published 19 January 2011

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.

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  • Received 26 October 2010

DOI:https://doi.org/10.1103/PhysRevD.83.023012

© 2011 American Physical Society

Authors & Affiliations

Matteo Martinelli1, Erminia Calabrese1, Francesco De Bernardis1, Alessandro Melchiorri1, Luca Pagano1, and Roberto Scaramella2

  • 1Physics Department and INFN, Universita’ di Roma “La Sapienza”, Ple Aldo Moro 2, 00185, Rome, Italy
  • 2INAF, Osservatorio Astronomico di Roma, via Frascati 33, 0040 Monte Porzio Catone (RM), Italy

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Vol. 83, Iss. 2 — 15 January 2011

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