Viscous holographic dark energy universe with Nojiri-Odintsov cut-off

Abstract

In this paper we consider a toy model of large scale universe, when one of the dark components is a generalized holographic DE with a Nojiri-Odintsov cut-off. On the other hand, we made another assumption concerning to the companion of considered DE model due to impossibility of exact parameterization of dark side of the large scale universe. In particular, we assume an inhomogeneous viscous dark fluid discussed in literature very actively, to be possible candidate for the companion. In addition to cosmographic analysis we discuss the results from $Om$ and two point $Om$ analysis and estimated present day values of statefinder parameters $(r,s)$ and $(\omega^{\prime }_{de}, \omega_{de})$ . Moreover, validity of generalized second law of thermodynamics is studied showing that theoretical results are well consistent with observational data. Constraints on cosmological parameters are due to Planck 2015 experiments.