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New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
(2019-12-01)
The nature of the dark sector components of the Universe still remains one of the largest unknown. Among many possibilities, it has been speculated that dark matter and dark energy may be more tightly coupled than usually ...
Secluded and putative flipped dark matter and Stueckelberg extensions of the standard model
(Iop Publishing Ltd, 2018-02-01)
We consider here three dark matter models with the gauge symmetry of the standard model plus an additional local U(1)(D) factor. One model is truly secluded and the other two models begin flipped, but end up secluded. All ...
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 ...
Nonbaryonic dark matter and scalar field coupled with a transversal interaction plus decoupled radiation
(Springer, 2013-04-17)
We analyze a universe filled with interacting dark matter, a scalar field accommodated as dark radiation along with dark energy plus a decoupled radiation term within the framework of the spatially flat Friedmann-Robertson-Walker ...
A novel method to extract dark matter parameters from neutrino telescope data
(Iop Publishing LtdBristolInglaterra, 2011)
Energia escura acoplada
(Universidade Estadual Paulista (Unesp), 2010-02-26)
Na última década várias observações indicam que o universo está expandindo aceleradamente. Essa expansão acelerada pode ser explicada em um universo composto de 70% de energia escura e 30% de matéria (25% de matéria escura ...
Spherical cows in dark matter indirect detection
(Iop Publishing Ltd, 2016-12-01)
Dark matter (DM) halos have long been known to be triaxial, but in studies of possible annihilation and decay signals they are often treated as approximately spherical. In this work, we examine the asymmetry of potential ...
Some remarks on the attractor behaviour in ELKO cosmology
(Iop Publishing Ltd, 2014-08-01)
Recent results on the dynamical stability of a system involving the interaction of the ELKO spinor field with standard matter in the universe have been reanalysed, and the conclusion is that such system does not exhibit ...
Destinos reais e potenciais para o turismo dark: uma análise de produções sobre serial killersReal and potential destinations for dark tourism: an analysis of productions about serial killers
(Universidade Federal do Rio Grande do NorteBrasilUFRNTurismoDepartamento de Turismo, 2023)
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 ...