A modified Chaplygin gas model with interaction |
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Authors: | Ya Bo Wu Song Li Ming Hui Fu Jing He |
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Institution: | (1) Department of physics, Liaoning Normal University, P. O. Box 567, Dalian, 116029, People’s Republic of China |
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Abstract: | A modified Chaplygin gas (MCG) model of unifying dark energy and dark matter is considered in this paper, in which dark energy
interacts with dark matter. Concretely, the evolution of such a unified dark sectors model is studied and the statefinder
diagnostic to the MCG model is performed in our model. By analysis, it is shown that the effective equation of state (EoS)
parameter of dark energy can cross the so-called phantom divide ω = −1, the behavior of MCG will be like ΛCDM in the future and therefore our Universe will not end up with Big Rip in the
future. Furthermore, we plot the evolution trajectories of the MCG model in the statefinder parameter r–s plane and illustrate the discrimination between this scenario and the generalized Chaplygin gas (GCG) model. |
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Keywords: | Modified Chaplygin gas(MCG) Dark matter Dark energy Statefinder diagnostic |
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