237 citations · 744 across the 25 of their papers we have counts for
25 papers
Twins in relativistic spacetimes: dispelling some misconceptions
T. A. A. da Câmara, P. S. Lemos, M. O. Calvão +1
In contrast to Newtonian physics, there is no absolute time in relativistic (Lorentzian) spacetimes. This immediately implies that two twins may, in general, age at different rates…
A unified approach to coupled homogeneous linear wave propagation in generic gravity
Lucas T. Santana, João C. Lobato, Ribamar R. R. Reis +1
Wave propagation is a common occurrence in all of physics. A linear approximation provides a simpler way to describe various fields related to observable phenomena in laboratory ph…
Gravitational wave energy momentum-tensor in reduced Horndeski theories
João C. Lobato, Maurício O. Calvão
We generalize, imposing the field equations only at dominant order, the Isaacson formula for the gravitational wave (GW) energy-momentum tensor (EMT) to the class of Horndeski theo…
Gravitational wave stochastic background in reduced Horndeski theories
João C. Lobato, Isabela S. Matos, Maurício O. Calvão +1
We generalize to reduced Horndeski theories of gravity, where gravitational waves (GWs) travel at the speed of light, the expression of a statistically homogeneous and unpolarized…
Testing gravity with gravitational wave friction and gravitational slip
Isabela S. Matos, Emilio Bellini, Maurício O. Calvão +1
Gravitational waves (GWs) emitted by binary sources are interesting signals for testing gravity on cosmological scales since they allow measurements of the luminosity distance. Whe…
New dynamical system approach to Palatini theories and its application to exponential gravity
João C. Lobato, Isabela S. Matos, Maurício O. Calvão +1
The approach of dynamical systems is a useful tool to investigate the cosmological history that follows from modified theories of gravity. It provides qualitative information on th…