309 citations · 4.1k across the 84 of their papers we have counts for
4 papers · 1 filter
Non singular bounce in modified gravity
L. Raul Abramo, Patrick Peter, Ivan Yasuda
We investigate bouncing solutions in the framework of the non-singular gravity model of Brandenberger, Mukhanov and Sornborger. We show that a spatially flat universe filled with o…
Signature of the interaction between dark energy and dark matter in observations
Elcio Abdalla, L. Raul Abramo, Jose C. C. de Souza
We investigate the effect of an interaction between dark energy and dark matter upon the dynamics of galaxy clusters. This effect is computed through the Layser-Irvine equation, wh…
Angular-planar CMB power spectrum
Thiago S. Pereira, L. Raul Abramo
Gaussianity and statistical isotropy of the Universe are modern cosmology's minimal set of hypotheses. In this work we introduce a new statistical test to detect observational devi…
The signature of dark energy perturbations in galaxy cluster surveys
L. Raul Abramo, Ronaldo C. Batista, Rogerio Rosenfeld
All models of dynamical dark energy possess fluctuations, which affect the number of galaxy clusters in the Universe. We have studied the impact of dark energy clustering on the nu…