74 citations · 155 across the 6 of their papers we have counts for
6 papers
Gravitational wave generation in power-law inflationary models
Paulo M. Sá, Alfredo B. Henriques
We investigate the generation of gravitational waves in power-law inflationary models. The energy spectrum of the gravitational waves is calculated using the method of continuous B…
The role of differential rotation in the evolution of the r-mode instability
Paulo M. Sá, Brigitte Tomé
We discuss the role of differential rotation in the evolution of the l=2 r-mode instability of a newly born, hot, rapidly-rotating neutron star. It is shown that the amplitude of t…
The r-mode instability: Analytical solution with gravitational radiation reaction
Oscar J. C. Dias, Paulo M. Sa
Analytical r-mode solutions are investigated within the linearized theory in the case of a slowly rotating, Newtonian, barotropic, non-magnetized, perfect-fluid star in which the g…
Stationary Black Holes in a Generalized Three-Dimensional Theory of Gravity
P. M. Sá, J. P. S. Lemos
We consider a generalized three-dimensional theory of gravity which is specified by two fields, the graviton and the dilaton, and one parameter. This theory contains, as particular…
BLACK HOLES IN THREE-DIMENSIONAL DILATON GRAVITY THEORIES
Paulo M. Sa', Antares Kleber, Jose' P. S. Lemos
Three dimensional black holes in a generalized dilaton gravity action theory are analysed. The theory is specified by two fields, the dilaton and the graviton, and two parameters,…
On the Cosmology of Massive Vector Fields with SO(3) Global Symmetry
M. C. Bento, O. Bertolami, P. V. Moniz +2
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