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Supernovae observations and cosmic topology
M. J. Reboucas, J. S. Alcaniz, B. Mota +1
Two fundamental questions regarding our description of the Universe concern the geometry and topology of its 3-dimensional space. While geometry is a local characteristic that give…
Constraints from the Detection of Cosmic Topology on the Generalized Chaplygin Gas
M. Makler, B. Mota, M. J. Reboucas
Despite our present-day inability to predict the topology of the universe one may expect that we should be able to detect it in the near future, given the increasing accuracy in th…
Detectability of Cosmic Topology in Generalized Chaplygin Gas Models
B. Mota, M. Makler, M. J. Reboucas
If the spatial section of the universe is multiply connected, repeated images or patterns are expected to be detected observationally. However, due to the finite distance to the la…
Extended Born-Infeld Dynamics and Cosmology
M. Novello, M. Makler, L. S. Werneck +1
We introduce an extension of the Born-Infeld action for a scalar field and show that it can act as unifying-dark-matter, providing an explanation for both structure formation and t…
Matter Power Spectrum for Convex Quartessence
R. R. R. Reis, M. Makler, I. Waga
The possibility of unifying dark-matter and dark-energy has recently attracted considerable interest. In this so called quartessence scenario, a single component is responsible for…