Solar system tests of a new class of f(z) theory
Abstract
Recently, a new kind of f(z) theory is proposed to provide a different perspective for the development of reliable alternative models of gravity in which the f(R) Lagrangian terms are reformulated as polynomial parametrizations f(z). In the previous study, the parameters in the f(z) models have been constrained by using cosmological data. In this paper, these models will be tested by the observations in the solar system. After solving the Ricci scalar as a function of the redshift, one could obtain f(R) that could be used to calculate the standard Parametrized-Post-Newtonian (PPN) parameters. First, we fit the parametric models with the latest cosmological observational data. Then, the tests are performed by solar system observations. And last we combine the constraints of solar system and cosmology together and reconstruct the f(R) actions of the f(z) parametric models.
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