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Cosmological model with interactions in the dark sector
(Springer/Plenum Publishers, 2009-04)
A cosmological model for the present Universe is analyzed whose constituents are a non-interacting baryonic matter field and interacting dark matter and dark energy fields. The dark energy and dark matter are coupled through ...
Dark energy as a kinematic effect
(2016-03-01)
We present a generalization of teleparallel gravity that is consistent with local spacetime kinematics regulated by the de Sitter group SO(1, 4). The mathematical structure of teleparallel gravity is shown to be given by ...
Modified holographic Ricci dark energy coupled to interacting dark matter and a non interacting baryonic component
(Springer, 2013-01)
We examine a Friedmann-Robertson-Walker universe filled with interacting dark matter, modified holographic Ricci dark energy (MHRDE), and a decoupled baryonic component.The estimations of the cosmic parameters with Hubble ...
CCDM model with spatial curvature and the breaking of dark degeneracy
(Iop Publishing Ltd, 2016-01-01)
Creation of Cold Dark Matter (CCDM), in the context of Einstein Field Equations, leads to a negative creation pressure, which can be used to explain the accelerated expansion of the Universe. Recently, it has been shown ...
Structure formation in the presence of dark energy perturbations
(Iop Publishing Ltd, 2007-11-01)
We study non-linear structure formation in the presence of dark energy. The influence of dark energy on the growth of large-scale cosmological structures is exerted both through its background effect on the expansion rate, ...
Structure formation in the presence of dark energy perturbations
(Iop Publishing Ltd, 2007-11-01)
We study non-linear structure formation in the presence of dark energy. The influence of dark energy on the growth of large-scale cosmological structures is exerted both through its background effect on the expansion rate, ...
A novel teleparallel dark energy model
(2016-02-01)
Although equivalent to general relativity, teleparallel gravity (TG) is conceptually speaking a completely different theory. In this theory, the gravitational field is described by torsion, not by curvature. By working in ...
Self-interacting holographic dark energy
(World Scientific, 2013-01)
We investigate a spatially flat Friedmann–Robertson–Walker (FRW) universe where dark matter exchanges energy with a self-interacting holographic dark energy (SIHDE). Using the χ 2 -statistical method on the Hubble function, ...
Supernova light-curve fitters and Dark Energy
(Elsevier Science, 2011-01)
We show that when a procedure is made to remove the tension between a supernova Ia (SN Ia) data set and observations from BAO and CMB, there might be the case where the same SN Ia set built with two different light-curve ...
Dark matter interacts with variable vacuum energy
(Springer, 2014-08)
We investigate a spatially flat Friedmann-Robertson-Walker (FRW) scenario with two interacting components, dark matter and variable vacuum energy (VVE) densities, plus two decoupled components, one is a baryon term while ...