Friedman—Robertson—Walker Models with Late-Time Acceleration

2011/02/01 by Abdussattar, S R Prajapati, S. R Prajapati · 6 citations
Physics and Astronomy · #Acceleration #Ansatz #COSMIC cancer database #Chaplygin gas #Cosmology and Gravitation Theories #Order (exchange) #Quantum and Classical Electrodynamics #Statistical Mechanics and Entropy #Variable (mathematics) #physics.gen-ph

paper · pdf · doi:10.1088/0256-307x/28/2/029803

published in Chinese Physics Letters 28(2), 029803 (Institute of Physics) · 7 pages, 0 figures

openalex publication_date 2011/02/01 · arxiv created 2016/04/11 · openalex created_date 2016/06/24 · arxiv updated 2017/11/13 · openalex updated_date 2026/08/05

Abstract

In order to account for the observed cosmic acceleration, a modification of the ansatz for the variation of density in Friedman—Robertson—Walker (FRW) FRW models given by Islam is proposed. The modified ansatz leads to an equation of state which corresponds to that of a variable Chaplygin gas, which in the course of evolution reduces to that of a modified generalized Chaplygin gas (MGCG) and a Chaplygin gas (CG), exhibiting late-time acceleration.

Citations

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