Roles of dark energy perturbations in dynamical dark energy models: can we ignore them?
Roles of dark energy perturbations in dynamical dark energy models: can we ignore them?
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DOI：
10.1103/physrevlett.103.151303
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发表时间：
2009-04
影响因子：
8.6
通讯作者：
Chan-Gyung Park;Jai-chan Hwang;Jae-heon Lee;H. Noh
中科院分区：
文献类型：
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作者：
Chan-Gyung Park;Jai-chan Hwang;Jae-heon Lee;H. Noh
我们显示的重要性，适当地包括暗能量分量的扰动的动态暗能量模型的基础上的标量场和修改的引力理论，以满足目前和未来的观测精度。基于一个简单的标度标量场暗能量模型，我们表明，观测可区分的实质性差异出现忽略暗能量扰动。通过忽略它的扰动系统的方程变得不一致和偏差（规范不变）功率谱依赖于规范的选择。
We show the importance of properly including the perturbations of the dark energy component in the dynamical dark energy models based on a scalar field and modified gravity theories in order to meet with present and future observational precisions. Based on a simple scaling scalar field dark energy model, we show that observationally distinguishable substantial differences appear by ignoring the dark energy perturbation. By ignoring it the perturbed system of equations becomes inconsistent and deviations in (gauge-invariant) power spectra depend on the gauge choice.