Buscar
Mostrando ítems 1-10 de 131
Influence of small-scale inhomogeneities on the cosmological consistency tests
(WILEY-BLACKWELLHOBOKEN, 2012)
The current cosmological dark sector (dark matter plus dark energy) is challenging our comprehension about the physical processes taking place in the Universe. Recently, some authors tried to falsify the basic underlying ...
Gravitational lensing by massless braneworld black holes
(American Physical Society, 2012-10)
In this paper, we study massless braneworld black holes as gravitational lenses. We find the weak and the strong deflection limits for the deflection angle, from which we calculate the positions and magnifications of the ...
Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
(Oxford University Press, 2018-04-15)
We present new results on gravitational lensing over cosmological Robertson-Walker backgrounds which extend and generalize previous works. Our expressions show the presence of new terms and factors which have been neglected ...
Simulation-based marginal likelihood for cluster strong lensing cosmology
(Wiley Blackwell Publishing, Inc, 2018-01)
Comparisons between observed and predicted strong lensing properties of galaxy clusters have been routinely used to claim either tension or consistency with Λ cold dark matter cosmology. However, standard approaches to ...
Combined constraints on deviations of dark energy from an ideal fluid from Euclid and Planck
(Oxford University Press, 2016)
Cosmological fluids are commonly assumed to be distributed in a spatially homogeneous way, while their internal properties are described by a perfect fluid. As such, they influence the Hubble expansion through their ...