Interacting viscous dark energy in Bianchi type-I Universe

A solution to the coincidence and Big Rip problems on the bases of an anisotropic space-time is proposed. To do so, we study the interaction between viscous dark energy and dark matter in the scope of the Bianchi type-I Universe. We parameterize the viscosity and the interaction between the two fluids by constants zeta (0) and sigma respectively. A detailed investigation on the cosmological implications of this parametrization has been made. We have also performed a geometrical diagnostic by using the statefinder pairs {s,r} and {q,r} in order to differentiate between different dark energy models. Moreover, we fit the coupling parameter sigma as well as the Hubble's parameter H (0) of our model by minimizing the chi (2) through the age differential method, involving a direct measurement of H.