104 citations · 255 across the 6 of their papers we have counts for
6 papers
Constraints on dark energy and cosmic topology
M. J. Reboucas
A non-trivial spatial topology of the Universe is a potentially observable attribute, which can be probed through the circles-in-the-sky for all locally homogeneous and isotropic u…
A note on the large-angle anisotropies in the WMAP cut-sky maps
A. Bernui, B. Mota, M. J. Reboucas +1
Recent analyses of the WMAP data seem to indicate the possible presence of large-angle anisotropy in the Universe. If confirmed, these can have important consequences for our under…
Energy Conditions and Cosmic Acceleration
J. Santos, J. S. Alcaniz, N. Pires +1
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors in different frameworks, and to derive general results that hold in a…
Energy Conditions and Supernovae Observations
J. Santos, J. S. Alcaniz, M. J. Reboucas
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors on physical grounds. We show that in the standard Friedmann-Lemaitre-Robertson-…
Cosmological Parameters and Cosmic Topology
M. J. Reboucas, J. S. Alcaniz
Geometry constrains but does not dictate the topology of the 3--dimensional space. In a locally spatially homogeneous and isotropic universe, however, the topology of its spatial s…
Generalized Chaplygin gas model, supernovae and cosmic topology
M. C. Bento, O. Bertolami, M. J. Rebouças +1
In this work we study to which extent the knowledge of spatial topology may place constraints on the parameters of the generalized Chaplygin gas (GCG) model for unification of dark…