Analysis on modified Chaplygin gas as dark energy model

作者：Wu, Ya-Bo^*; Zhang, Cheng-Yuan; Lu, Jian-Bo; Lu, Jun-Wang; Zhang, Xue; Qi, Qing-Mei; Fan, Bi

来源：Modern Physics Letters A, 2015, 30(1): 1550005.

DOI：10.1142/S0217732315500054

• Modified Chaplygin gas
• dark energy
• Om diagnostic

In this paper, we will continue to study the modified Chaplygin gas (MCG) based on Ref. 25. Concretely, we not only discuss both the change rates of the energy densities and the Hubble parameter H(z) as a function of the model parameters, which is compared and consistent with the related data in Ref. 27, but also perform the Om diagnostic in order to geometrically differentiate the MCG model from the Lambda CDM, GCG and CG models. Moreover, we plot the evolutionary trajectories of MCG model with different interaction terms in Om planes, and find that the coupling intensity b(2) plays an important role in the MCG model. Furthermore, we also reconstruct the potential of MCG scalar field as well as the dynamics of the scalar field according to the evolution of the MCG dark energy. It is worth stressing that the results given by us can include the ones without interaction as the special cases.

• 出版日期2015-1-10
• 单位辽宁师范大学