Little Rip cosmological models with time-dependent equation of state

Understand

Specific dark energy models, leading to the Little Rip (LR) cosmology in the far future, are investigated.

• Conditions for the occurrence of LR in terms of the parameters present in the proposed equation of state for the dark energy cosmic fluid are studied.
• Estimates about the time needed before the occurrence of the rip singularity in the standard LR model and the model in which the universe approaches the de Sitter space-time asymptotically, are given.