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Exact Causal Viscous Cosmologies

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Abstract

The general exact solution of the gravitational field equations for a homogeneous flat Friedmann-Robertson-Walker universe filled with a causal bulk viscous fluid with bulk viscosity coefficient proportional to the Hubble function is obtained in the framework of the full causal Israel-Stewart-Hiscock theory. The general solution of the field equations is represented in an exact closed parametric form and corresponds to a transition between two Minkowskian space-times connected by an inflationary period. The evolution of the temperature, entropy, deceleration parameter and bulk viscosity coefficient are considered in the general case. Particular solutions corresponding to a particular choice of parameters and leading to a non-inflationary evolution of the universe are presented too.

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Authors
  1. M. K. Mak
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  2. T. Harko
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Mak, M.K., Harko, T. Exact Causal Viscous Cosmologies. General Relativity and Gravitation 30, 1171–1186 (1998). https://doi.org/10.1023/A:1026690710970

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  • DOI: https://doi.org/10.1023/A:1026690710970

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