309 citations · 4.1k across the 84 of their papers we have counts for
17 papers · 1 filter
Physical approximations for the nonlinear evolution of perturbations in dark energy scenarios
L. R. Abramo, R. C. Batista, L. Liberato +1
The abundance and distribution of collapsed objects such as galaxy clusters will become an important tool to investigate the nature of dark energy and dark matter. Number counts of…
Signature of the interaction between dark energy and dark matter in galaxy clusters
E. Abdalla, L. R. Abramo, L. Sodre +1
We investigate the influence of an interaction between dark energy and dark matter upon the dynamics of galaxy clusters. We obtain the general Layser-Irvine equation in the presenc…
Real space tomography of the primordial Universe with cluster polarization
L. Raul Abramo, Henrique S. Xavier
We describe how a survey of the polarization of the cosmic microwave background induced by Compton scattering in galaxy clusters can be used to make a full spatial reconstruction o…
Anomalies in the low CMB multipoles and extended foregrounds
L. Raul Abramo, Laerte Sodre, Carlos Alexandre Wuensche
We discuss how an extended foreground of the cosmic microwave background (CMB) can account for the anomalies in the low multipoles of the CMB anisotropies. The distortion needed to…
Alignment tests for low CMB multipoles
L. Raul Abramo, Armando Bernui, Ivan S. Ferreira +2
We investigate the large scale anomalies in the angular distribution of the cosmic microwave background radiation as measured by WMAP using several tests. These tests, based on the…
On the Stability of Phantom K-essence Theories
L. Raul Abramo, Nelson Pinto-Neto
We show that phantom dark energy, if it is described by a K-essence theory, has three fundamental problems: first, its hamiltonian is unbounded from below. Second, classical stabil…