http://arxiv.org/abs/1404.1910
We study a viable cosmological model, which offers a Big Rip future of the Universe. The model arises from a naturally motivated linearly time varying equation of state parameter for the effective cosmic fluid that fills the fabric of spatially flat and homogeneous Robertson-Walker spacetime in general relativity. The model exhibits two worthy features: (i) It fits the observational data from the latest $H(z)$ and Union 2.1 SN Ia compilations matching the success of $\Lambda$CDM model. (ii) It describes the evolution of the Universe from the matter-dominated phase to the recent accelerating phase similar to the $\Lambda$CDM model but leads to Big Rip end of the Universe contrary to the de Sitter one in the $\Lambda$CDM model. We investigate the matter and dark energy sources in the model, in particular, behavior of the dynamical dark energy responsible for the Big Rip end of Universe.
S. Kumar
Wed, 9 Apr 14
56/67
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