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Higher-order gravity and the cosmological background of gravitational waves
S. Capozziello, M. De Laurentis, M. Francaviglia
The cosmological background of gravitational waves can be tuned by the higher-order corrections to the gravitational Lagrangian. In particular, it can be shown that assuming $R^{1+…
Solar system and equivalence principle constraints on f(R) gravity by chameleon approach
Salvatore Capozziello, Shinji Tsujikawa
We study constraints on f(R) dark energy models from solar system experiments combined with experiments on the violation of equivalence principle. When the mass of an equivalent sc…
Tuning the stochastic background of gravitational waves with theory and observations
Christian Corda, Salvatore Capozziello, Mariafelicia De Laurentis
In this this paper the stochastic background of gravitational waves (SBGWs) is analyzed with the auxilium of the WMAP data. We emphasize that, in general, in previous works in the…
Spherical symmetry in -gravity
S. Capozziello, A. Stabile, A. Troisi
Spherical symmetry in gravity is discussed in details considering also the relations with the weak field limit. Exact solutions are obtained for constant Ricci curvature sca…
The Newtonian Limit of F(R) gravity
S. Capozziello, A. Stabile, A. Troisi
A general analytic procedure is developed to deal with the Newtonian limit of gravity. A discussion comparing the Newtonian and the post-Newtonian limit of these models is p…
f(R) Gravity with Torsion: The Metric-Affine Approach
S. Capozziello, R. Cianci, C. Stornaiolo +1
The role of torsion in f(R) gravity is considered in the framework of metric-affine formalism. We discuss the field equations in empty space and in presence of perfect fluid matter…