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.
Constraining modified gravitational theories by weak lensing with Euclid / Martinelli, Matteo; Calabrese, Erminia; DE BERNARDIS, Francesco; Melchiorri, Alessandro; Pagano, Luca; Roberto, Scaramella. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 83:2(2011), pp. 023012-023017. [10.1103/physrevd.83.023012]
Constraining modified gravitational theories by weak lensing with Euclid
MARTINELLI, MATTEO;CALABRESE, ERMINIA;DE BERNARDIS, FRANCESCO;MELCHIORRI, Alessandro;PAGANO, LUCA;
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
