296 citations · 1.1k across the 20 of their papers we have counts for
8 papers · 1 filter
Latest supernovae constraints on f(R) cosmologies
J. Santos, J. S. Alcaniz, F. C. Carvalho +1
A class of modified gravity, known as -gravity, has presently been applied to Cosmology as a realistic alternative to dark energy. In this paper we use the most recent Type-I…
Cosmological Constraints from Hubble Parameter on f(R) Cosmologies
F. C. Carvalho, E. M. Santos, J. S. Alcaniz +1
Modified gravity in the Palatini approach has been presently applied to Cosmology as a realistic alternative to dark energy. In this concern, a number of authors have search…
Energy conditions in f(R)-gravity
J. Santos, J. S. Alcaniz, M. J. Reboucas +1
In order to shed some light on the current discussion about f(R)-gravity theories we derive and discuss the bounds imposed by the energy conditions on a general f(R) functional for…
Lookback time bounds from energy conditions
J. Santos, J. S. Alcaniz, M. J. Reboucas +1
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors on physical grounds. We show that in the standard Friedmann-Lemaitre-Robertson-…
Energy Conditions and Cosmic Acceleration
J. Santos, J. S. Alcaniz, N. Pires +1
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors in different frameworks, and to derive general results that hold in a…
Energy Conditions and Supernovae Observations
J. Santos, J. S. Alcaniz, M. J. Reboucas
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors on physical grounds. We show that in the standard Friedmann-Lemaitre-Robertson-…