359 citations · 1.7k across the 47 of their papers we have counts for
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gr-qc2012★ 37 cited
Focusing of geodesic congruences in an accelerated expanding Universe
F. D. Albareti, J. A. R. Cembranos, A. de la Cruz-Dombriz
We study the accelerated expansion of the Universe through its consequences on a congruence of geodesics. We make use of the Raychaudhuri equation which describes the evolution of…
astro-ph.CO2012★ 67 cited
Isotropy theorem for cosmological vector fields
J. A. R. Cembranos, C. Hallabrin, A. L. Maroto +1
We consider homogeneous abelian vector fields in an expanding universe. We find a mechanical analogy in which the system behaves as a particle moving in three dimensions under the…