Open AccessBianchi Type VI Cosmological Model with Dynamical Cosmological Parameters G and ⩘ in the presence of Bulk Viscous Stress
Author(s) -
Shilpa Samdurkar,
Seema Bawnerkar
Publication year - 2019
Publication title -
international journal of scientific research in science, engineering and technology
Language(s) - English
Resource type - Journals
eISSN - 2395-1990
pISSN - 2394-4099
DOI - 10.32628/ijsrset196149
Subject(s) - distance modulus , physics , luminosity distance , volume viscosity , cosmological constant , type (biology) , mathematical physics , astrophysics , metric expansion of space , function (biology) , supernova , anisotropy , viscosity , cosmology , dark energy , thermodynamics , quantum mechanics , globular cluster , galaxy , ecology , evolutionary biology , biology
In the present study, we have obtained Bianchi type VI anisotropic model of the universe filled with a bulk viscous stress in the presence of variable gravitational and cosmological constants. Here we have assumed the cosmological term in the form Λ∝H to discuss the effect of cosmological variables. It is found that the bulk viscosity coefficient (ξ) is a decreasing function of time. The expression for proper distance, luminosity distance, angular diameter distance, look back time and distance modulus curve have been analyzed and also the distance modulus curve of derived model nearly matches with Supernova Ia (SN Ia) observations.