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Crossing SNe Ia and BAO observational constraints with local ones in hybrid metric-Palatini gravity

I. Leanizbarrutia, F. S. N. Lobo, D. SŠez Gůmez

Abstract

In this paper, we consider the recently proposed hybrid metric-Palatini gravitational theory, which consists of adding to the Einstein-Hilbert Lagrangian an f(ℜ) term constructed à la Palatini. Using the respective dynamically equivalent scalar-tensor representation, we explore the cosmological evolution of a specific model, given by f(ℜ)2, and obtain constraints on the free parameters by using different sources of cosmological data. The viability of the model is analyzed by combining the conditions imposed by the supernovae Ia and baryonic acoustic oscillation data and the results are compared with the local constraints.

Keywords
COSMOLOGICAL PARAMETER-ESTIMATION; DARK-ENERGY; GENERAL-RELATIVITY; F(R) THEORIES; SUPERNOVAE; HISTORY

Physical Review D
Volume 95, Issue 8, Page 10
2017 April

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Instituto de Astrof√≠sica e Ci√™ncias do Espa√ßo Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia