Bulk Viscous String Cosmological Model in a Modified Theory of Gravity

Abstract

A study of the dynamics of Marder type cosmological model based on bulk viscous strings in the paradigm of  gravity theory is described in this article. The solution for the field equations has been obtained by using the proportionality condition between the shear scalar   and the expansion scalar ,  that gives a relation betwixt metric potentials, and other being the use Hybrid expansion law (HEL). The kinematic and geometrical properties of our model namely deceleration parameter (DP)  “cosmographic parameters jerk (j), snap (s) and lerk (l)”, squared speed of sound (), ,  statefinder plane and the energy conditions have been examined. After the graphical analysis of the dynamical features of the constructed model it is found that the model gives the description for the Universe’s accelerated expansion and this is significant as these theoretical results are in accordance with the astronomical observations.