Bulk viscosity driving the acceleration of the Universe

Details Bulk viscosity driving the acceleration of the Universe Bulk viscosity driving the acceleration of the Universe

2005-03-16

arxiv.org/abs/astro-ph/0503362v1

Gen.Rel.Grav.38:495-506,2006

Astronomy and Astrophysics

Astrophysics

Latex file, 8 pages, 3 eps figures

Scientific paper

10.1007/s10714-006-0236-y

The possibility that the present acceleration of the universe is driven by a kind of viscous fluid is exploited. At background level this model is similar to the generalized Chaplygin gas model (GCGM). But, at perturbative level, the viscous fluid exhibits interesting properties. In particular the oscillations in the power spectrum that plagues the GCGM are not present. Possible fundamental descriptions for this viscous dark energy are discussed.

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