Some FRW Models of Accelerating Universe with Dark Energy
arXiv:1010.0672 · doi:10.1007/s10509-010-0540-6
Abstract
The paper deals with a spatially homogeneous and isotropic FRW space-time filled with perfect fluid and dark energy components. The two sources are assumed to interact minimally, and therefore their energy momentum tensors are conserved separately. A special law of variation for the Hubble parameter proposed by Berman (1983) has been utilized to solve the field equations. The Berman's law yields two explicit forms of the scale factor governing the FRW space-time 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 FRW universe. It has been found that dark energy dominates the universe at the present epoch, which is consistent with the observations. The physical behavior of the universe is discussed in detail.
10 pages, 5 figures
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- Two-fluid atmosphere from decelerating to accelerating FRW dark energy models
- Power-law solution for homogeneous and isotropic universe in gravity
- Bianchi type II models in the presence of perfect fluid and anisotropic dark energy
- FLRW accelerating universe with interactive dark energy
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- An FLRW interacting dark energy model of the Universe
- FRW dark energy cosmological model with hybrid expansion law
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