Open Access Open Access  Restricted Access Subscription or Fee Access

A Cosmological Model Explained with Lambda Term

R. K. Tiwari, U. K. Dwivedi, V. Mishra


In this paper, we have studied the LRS Bianchi type-I cosmological model filled with viscous fluid and time varying cosmological term Λ. Exact solution of Einstein field equations are obtained by considering a condition between metric potentials. It is assumed that coefficient of viscosity of bulk viscous fluid is a power function of mass density whereas coefficient of shear viscosity is proportional to expansion scalar in the model of the universe. We have found that the cosmological term Λ is positive and is a decreasing function of time t. A careful analysis of all the physical parameters of the model has also been carried out.

Full Text: