Bianchi type string cosmological models in f(R,T) gravity
Department of Mathematics, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, 500078, Hyderabad, India
2 Center for Theoretical Physics, Jamia Millia Islamia, 110025, New Delhi, India
* e-mail: firstname.lastname@example.org
Accepted: 29 August 2016
Published online: 23 September 2016
In this work we have studied Bianchi-III and - VI 0 cosmological models with string fluid source in f(R,T) gravity (T. Harko et al., Phys. Rev. D 84, 024020 (2011)), where R is the Ricci scalar and T the trace of the stress energy-momentum tensor in the context of late time accelerating expansion of the universe as suggested by the present observations. The exact solutions of the field equations are obtained by using a time-varying deceleration parameter. The universe is anisotropic and free from initial singularity. Our model initially shows acceleration for a certain period of time and then decelerates consequently. Several dynamical and physical behaviors of the model are also discussed in detail.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2016