Unified dissipative dark matter model in a non linear Israel-Stewart theory

Understand

In this paper we study the Statefinder and $Om(x)$ diagnoses of an exact solution of a unified dissipative dark matter model in the framework the Israel-Stewart theory and its non linear extension, considering the condition of positive entropy production.

• The implementation of two diagnoses in the pair of solutions reveal that both solutions can emulate the $\Lambda$CDM model at some stage of the cosmic evolution and behave as quintessence dark energy.
• The stability of both solutions is discussed from the point of view of the Liapunov's method, showing that they are asymptotic stable.
• Additionally we show that the solutions are also stable under small perturbations.