Umiltà, C.C.UmiltàBallardini, M.M.BallardiniFINELLI, FABIOFABIOFINELLIPAOLETTI, DANIELADANIELAPAOLETTI2020-03-282020-03-2820151475-7516http://hdl.handle.net/20.500.12386/23665We study the predictions for structure formation in an induced gravity dark energy model with a quartic potential. By developing a dedicated Einstein-Boltzmann code, we study self-consistently the dynamics of homogeneous cosmology and of linear perturbations without using any parametrization. By evolving linear perturbations with initial conditions in the radiation era, we accurately recover the quasi-static analytic approximation in the matter dominated era. We use PLANCK 2013 data and a compilation of baryonic acoustic oscillation (BAO) data to constrain the coupling γ to the Ricci curvature and the other cosmological parameters. By connecting the gravitational constant in the Einstein equation to the one measured in a Cavendish-like experiment, we find γ < 0.0012 at 95% CL with PLANCK 2013 and BAO data. This is the tightest cosmological constraint on γ and on the corresponding derived post-Newtonian parameters. Because of a degeneracy between γ and the Hubble constant H<SUB>0</SUB>, we show how larger values for γ are allowed, but not preferred at a significant statistical level, when local measurements of H<SUB>0</SUB> are combined in the analysis with PLANCK 2013 data. <P />ELETTRONICOenArticle10.1088/1475-7516/2015/08/0172-s2.0-849408696900003650466000172015JCAP...08..017UFIS/05 - ASTRONOMIA E ASTROFISICA