A comparative study of cosmological models in alternative theory of gravity with LVDP & BVDP.

Mishra, R.; Chand, Avtar

In this communication we have presented a comparative study of Friedmann-Lemaître-Robertson-Walker (FLRW) cosmological models in alternative theory of gravity with linearly varying deceleration parameter (LVDP) and bilinearly varying deceleration parameter (BVDP) as suggested by Mishra and Chand (Astrophys. Space Sci. 361:259, 2016c). The role of viscosity in cosmology have been studied by several researchers. Under the influence of such study we have also studied bulk viscous fluid cosmological models in alternative $f(R,T)$ theory of gravity along with comparison of results by taking LVDP and BVDP. The main conclusion of the paper is that BVDP law provides better results in comparative with Berman's constant deceleration law (CDP) and LVDP law. Also the BVDP law provides an envelope for CDP law and LVDP law.

GRAVITY; ACCELERATION (Mechanics); VISCOSITY; COSMOLOGICAL constant; NEWTON'S second law of motion

Astrophysics & Space Science, 2017, Vol 362, Issue 8, p1

0004-640X

Academic Journal

10.1007/s10509-017-3117-9