Dark energy from temporal and spatial singularities of pressure

Abstract

Institute of Physics, University of Szczecin, Wielkopolska 15, 70-451 Szczecin, Poland.Received 15 November 2009, accepted 4 January 2010Published online XXXKey words exotic singularities, inhomogeneous models, dark energyPACS 04.20.Dw; 11.25.-w; 98.80.Es; 98.80.JkI describe an opportunity to mimic dark energy leading to a current acceleration of the universe by theapplication of the pressure singularities surrounding an observer. Two essentially different models are in-vestigated. In the first one, the acceleration is due to an approach to a pressure singularity which appearson a constant time hypersurface. In the second one, the acceleration is due to the existence of the pressuresingularities in some regions of space. Both models are tested positively against observations.