136 citations · 887 across the 29 of their papers we have counts for
29 papers
Viability of nonminimally coupled f (R) gravity
Orfeu Bertolami, Jorge Páramos
In this work we explore the viability of nonminimally coupled matter- curvature gravity theories, namely the conditions required for the absence of tachyon instabilities and ghost…
Modelling the nongravitational acceleration during Cassini's gravitation experiments
O. Bertolami, F. Francisco, P. J. S. Gil +1
In this paper we present a computation of the thermally generated acceleration of the Cassini probe during its solar conjunction experiment, obtained from a model of the spacecraft…
Homogeneous spherically symmetric bodies with a nonminimal coupling between curvature and matter: the choice of the Lagrangian density for matter
Orfeu Bertolami, Jorge Páramos
In this work we study how a nonminimal coupling between matter and gravity can modify the structure of a homogeneous spherical body. The physical relevance of the adopted Lagrangia…
Testing the Flyby Anomaly with the GNSS Constellation
O. Bertolami, F. Francisco, P. J. S. Gil +1
We propose the concept of a space mission to probe the so called flyby anomaly, an unexpected velocity change experienced by some deep-space probes using earth gravity assists. The…
Testing a non-minimal coupling between matter and curvature
J. Páramos
One of the most interesting and current phenomenological extensions of General Relativity is the so-called class of theories; a natural generalization of this includes an e…
Mimicking the cosmological constant: constant curvature spherical solutions in a non-minimally coupled model
J. Páramos, O. Bertolami
The purpose of this study is to describe a perfect fluid matter distribution that leads to a constant curvature region, thanks to the effect of a non-minimal coupling. This distrib…