Dark energy and dark matter perturbations in singular universes

Abstract

We discuss the evolution of density perturbations of dark matter and dark energy in cosmological models which admit future singularities in a finite time. Up to now geometrical tests of the evolution of the universe do not differentiate between singular universes and $\Lambda$CDM scenario. We solve perturbation equations using the gauge invariant formalism. The analysis shows that the detailed reconstruction of the evolution of perturbations within singular cosmologies, in the dark sector, exhibit important differences between the singular universes models and the $\Lambda$CDM cosmology. This is encouraging for further examination and gives hope for discriminating between those models with future galaxy weak lensing experiments like the Dark Energy Survey (DES) and Euclid or CMB observations like PRISM and CoRE.

13 pages; slightly improved version

References in corpus (10)

• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Gauge-invariant analysis of perturbations in Chaplygin gas unified models of dark matter and dark energy
• Barotropic index w-singularities in cosmology
• How far is it to a sudden future singularity of pressure?
• Tachyon cosmology, supernovae data and the Big Brake singularity
• Quasi-Rip: A New Type of Rip Model without Cosmic Doomsday
• Will the tachyonic Universe survive the Big Brake?
• Density preturbations in a finite scale factor singularity universe
• Combined cosmological tests of a bivalent tachyonic dark energy scalar field model
• Parametrizing the transition to the phantom epoch with Supernovae Ia and Standard Rulers

Cited by in corpus (2)

• Gravitational Waves in Locally Rotationally Symmetric (LRS) Class II Cosmologies
• Criticality and Big Brake singularities in the tachyonic evolutions of closed Friedmann universes with cold dark matter