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Extended Theories of Gravity with Generalized Energy Conditions
José P. Mimoso, Francisco S. N. Lobo, Salvatore Capozziello
We address the problem of the energy conditions in modified gravity taking into account the additional degrees of freedom related to scalar fields and curvature invariants. The lat…
Selection effects in Gamma Ray Bursts correlations: consequences on the ratio between GRB and star formation rates
Maria Giovanna Dainotti, Roberta Del Vecchio, Shigehiro Nagataki +1
Gamma Ray Bursts (GRBs) visible up to very high redshift have become attractive targets as potential new distance indicators. It is still not clear whether the relations proposed s…
Noether Symmetry Approach for teleparallel-curvature cosmology
Salvatore Capozziello, Mariafelicia De Laurentis, Ratbay Myrzakulov
We consider curvature-teleparallel gravity, where the gravitational Lagrangian density is given by an arbitrary function of the Ricci scalar and the torsion scalar …
Probing gravity with PLANCK data on cluster pressure profiles
I. De Martino, M. De Laurentis, F. Atrio-Barandela +1
Analytical -gravity models introduce Yukawa-like corrections to the Newtonian potential in the weak field limit. These models can explain the dynamics of galaxies and cluster…
Chaos Removal in the gravity: the Mixmaster model
Riccardo Moriconi, Giovanni Montani, Salvatore Capozziello
We study the asymptotic dynamics of the Mixmaster Universe, near the cosmological singularity, considering gravity up to a quadratic corrections in the Ricci scalar . The…
Self-gravitating systems in Extended Gravity
A. Stabile, S. Capozziello
Starting from the weak field limit, we discuss astrophysical applications of Extended Theories of Gravity where higher order curvature invariants and scalar fields are considered b…