Quintessence model and observational constraints

被引：12

作者：

Gong, YG ^{[1
]}

机构：

[1] Oregon Grad Inst, Dept Elect & Comp Engn, Beaverton, OR 97006 USA

来源：

CLASSICAL AND QUANTUM GRAVITY | 2002年 / 19卷 / 17期

关键词：

D O I：

10.1088/0264-9381/19/17/305

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent observations of type Ia supernovae strongly support the view that the universe is accelerating now and decelerated in the recent past. By assuming a general relation between the quintessence potential and the quintessence kinetic energy, a general relation is found between the quintessence energy density and the scale factor. The potential includes both the hyperbolic and the double exponential potentials. A detailed analysis of the transition from the deceleration phase to the acceleration phase is then performed. We show that the current constraints on the transition time, the equation of state and the energy density of the quintessence field are satisfied in the model.

引用

页码：4537 / 4541

页数：5

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