Astrophysics and Space Science

, Volume 355, Issue 2, pp 399–403 | Cite as

Dark energy coupled with dark matter in viscous fluid cosmology

Original Article

Abstract

We investigate cosmological models with two interacting fluids: dark energy and dark matter in flat Friedmann-Robertson-Walker universe. The interaction between dark energy and dark matter is described in terms of the parameters present in the inhomogeneous equation of state when allowance is made for bulk viscosity, for the Little Rip, the Pseudo Rip, and the bounce universes. We obtain analytic representation for characteristic properties in these cosmological models, in particular the bulk viscosity ζ=ζ(H,t) as function of Hubble parameter and time. We discuss the corrections of thermodynamical parameters in the equations of state due coupling between the viscous fluid and dark matter. Some common properties of these corrections are elucidated.

Keywords

Dark energy Dark matter Viscous cosmology 

Notes

Acknowledgement

This work was supported by a grant from the Russian Ministry of Education and Science, project TSPU-139 (A.V.T. and V.V.O.).

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Department of Energy and Process EngineeringNorwegian University of Science and TechnologyTrondheimNorway
  2. 2.Tomsk State Pedagogical UniversityTomskRussia

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