CAN THE CHAPLYGIN GAS BE A PLAUSIBLE MODEL FOR DARK ENERGY
CAN THE CHAPLYGIN GAS BE A PLAUSIBLE MODEL FOR DARK ENERGY
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DOI：
10.1103/physrevd.67.063509
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发表时间：
2002-09
影响因子：
5
通讯作者：
V. Gorini;A. Kamenshchik;U. Moschella
中科院分区：
文献类型：
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作者：
V. Gorini;A. Kamenshchik;U. Moschella
在本文中，根据最近提出的“寻态器”参数，分析了两个表示充满Chaplygin流体的平坦弗里德曼宇宙的宇宙学模型，有或没有尘埃。两种模型在参数平面上的轨迹w.r.t有显著差异。“quiessence”和“tracker”模型。对状态方程为$p = -A/\rho^{\alpha}$的广义Chaplygin气体模型进行了状态器参数的分析。
In this note two cosmological models representing the flat Friedmann Universe filled with a Chaplygin fluid, with or without dust, are analyzed in terms of the recently proposed "statefinder" parameters. Trajectories of both models in the parameter plane are shown to be significantly different w.r.t. "quiessence" and "tracker" models. The generalized Chaplygin gas model with an equation of state of the form $p = -A/\rho^{\alpha}$ is also analyzed in terms of the statefinder parameters.