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Title of Journal: Astrophys Space Sci

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Abbravation: Astrophysics and Space Science

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Springer Netherlands

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DOI

10.1016/0923-1811(92)90262-A

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1572-946X

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The signchangeable interaction between variable g

Authors: Y D Xu Z G Huang
Publish Date: 2012/11/07
Volume: 343, Issue: 2, Pages: 807-811
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Abstract

In this paper we study a cosmological model with the signchangeable interaction between variable generalized Chaplygin gas VGCG and dark matter The dynamical analysis indicates that there exists a stable scaling attractor which can help to alleviate the coincidence problem Furthermore when the parameters of the model take some fixed values the attractor corresponds to the phase w=−0939 and the equation of state of VGCG approaches it from either w−1 or w−1 depending on the choice of its initial cosmic density parameter and the ratio of pressure to critical energy density So the phantom divide can be crossed We find the interaction term Q can change its sign from Q0 to Q0 as the universe expands which is different from the usual interaction Also we place constraints on the parameters from the point of view of dynamics

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