On the phenomenology of extended Brans-Dicke Gravity

Abstract

We introduce a designer approach for extended Brans-Dicke gravity that allows us to obtain the evolution of the scalar field by fixing the Hubble parameter to that of a $w$CDM model. We obtain analytical approximations for $\varphi$ as a function of the scale factor and use these to build expressions for the effective Newton's constant at the background and at the linear level and the slip between the perturbed Newtonian potentials. By doing so, we are able to explore their dependence on the fundamental parameters of the theory.

19 pages, 8 Figures. Minor revisions to match version accepted by JCAP

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Cited by in corpus (6)

• The Observational Future of Cosmological Scalar-Tensor Theories
• Testing Gravity on Cosmic Scales: A Case Study of Jordan-Brans-Dicke Theory
• Cosmological Constraints on sub-horizon scales modified gravity theories with MGCLASS II
• Electroweak baryogenesis by primordial black holes in Brans-Dicke modified gravity
• A note on the initial conditions within the effective field theory approach of cosmic acceleration
• Matter growth in extended $\Lambda$CDM cosmology