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Bulk viscous cosmological model with interacting dark fluids · Around

2011

Bulk viscous cosmological model with interacting dark fluids

Kremer, Gilberto M., Sobreiro, Octavio A. S.

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The objective of the present work is to study a cosmological model for a spatially flat Universe whose constituents are a dark energy field and a matter field which includes baryons and dark matter.

The constituents are supposed to be in interaction and irreversible processes are taken into account through the inclusion of a non-equilibrium pressure.
The non-equilibrium pressure is considered to be proportional to the Hubble parameter within the framework of a first order thermodynamic theory.
The dark energy and matter fields are coupled by their barotropic indexes, which are considered as functions of the ratio between their energy densities.

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