2010/10/29 by Suresh Kumar, SURESH KUMAR, Anil Kumar Yadav +1 · 99 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology and Gravitation Theories #Dark energy #Dark fluid #De Sitter universe #Deceleration parameter #Equation of state #Flatness (cosmology) #Flatness problem #Galaxies: Formation, Evolution, Phenomena #Scale factor (cosmology) #Universe #gr-qc #physics.gen-ph
paper · pdf · doi:10.1142/s0217732311035018
published in Modern Physics Letters A 26(09), 647-659 (World Scientific) · 9 pages, 5 figures
arxiv created 2010/10/29 · openalex publication_date 2011/03/21 · arxiv updated 2014/08/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The paper deals with a spatially homogeneous and anisotropic universe filled with perfect fluid and dark energy components. The two sources are assumed to interact minimally together with a special law of variation for the average Hubble's parameter in order to solve the Einstein's field equations. The law yields two explicit forms of the scale factor governing the Bianchi-V spacetime and constant values of deceleration parameter. The role of dark energy with variable equation of state parameter has been studied in detail in the evolution of Bianchi-V universe. It has been found that dark energy dominates the universe at the present epoch, which is consistent with the observations. The universe achieves flatness after the dominance of dark energy. The physical behavior of the universe has been discussed in detail.