36 citations · 81 across the 16 of their papers we have counts for
16 papers
Primordial Perturbations Including Second-Order Derivatives of the Inflationary Potential
Paulo Custodio, Cristian R. Ghezzi, Nadja S. Magalhae +1
In inflationary cosmology, the form of the potential is still an open problem. In this work, second-order effects of the inflationary potential are evaluated and related to the kno…
The Analysis of a Proposed Experiment to Measure the Speed of Gravity in Short Distances
Carlos Frajuca, Fabio da Silva Bortoli, Nadja Simão Magalhaes
In order to investigate the speed of gravitational signals travelling in air or through a different medium two experiments were designed. One of the experiments contains 2 masses r…
The Laser Gravitational Compass
Ivan S. Ferreira, C. Frajuca, Nadja S. Magalhaes +2
Using the observational properties of Einstein's gravitational field it is shown that a minimum of four non-coplanar mass probes are necessary for the Michelson and Morley interfer…
Geometrical Aspects of Venus Transit
Alberto C. Bertuola, C. Frajuca, N. S. Magalhães +1
We obtained two astronomical values, the Earth-Venus distance and Venus diameter, by means of a geometrical treatment of photos taken of Venus transit in June of 2012. Here we pres…
Omnidirectional Gravitational Wave Detector with a Laser-Interferometric Gravitational Compass
M. D. Maia, Ivan S. Ferreira, Claudio M. G. Sousa +2
Based on the Szekeres-Pirani gravitational compass we suggest the addition of a fourth, non-coplanar mass/mirror to the presently existing laser based gravitational wave observator…
Braking indices of pulsars obtained in the presence of an effective force
N. S. Magalhaes, A. S. Okada, C. Frajuca
Braking indices of pulsars present a scientific challenge as their theoretical calculation is still an open problem. In this paper we report results of a study regarding such calcu…