Dark energy and viscous cosmology

By Iver Brevik, O. Gorbunova. 2005

256 citations recorded by the source corpus.

Singularities in the dark energy universe are discussed, assuming that there is a bulk viscosity in the cosmic fluid. In particular, it is shown how the physically natural assumption of letting the bulk viscosity be proportional to the scalar expansion in a spatially flat FRW universe can drive the fluid into the phantom region (w < −1), even if it lies in the quintessence region (w > −1) in the non-viscous case.

Subfields: Astronomy and Astrophysics, Atmospheric Science

View Paper: https://www.semanticscholar.org/paper/58b48747ed0bbf3cb257a134c1f3391b9d9451b9

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In Astronomy and Astrophysics

In Atmospheric Science

Citations in the corpus

Viscous Cosmology for Early- and Late-Time Universe (2017, background): “Such a universe model was actually considered earlier, by Brevik and Gorbunova [86, 87] and by Grøn [88], and is also similar to the model of Padmanabhan and Chitre considered above [79].”
Anisotropic dark energy: dynamics of the background and perturbations (2008, background): “A bulk viscosity [63–66] could also have interesting consequences in this framework; however we do not focus further on the Navier-Stokes type of stress in the present study.”