Roles of dark energy perturbations in the dynamical dark energy models: Can we ignore them?
arXiv:0904.4007 · doi:10.1103/PhysRevLett.103.151303
Abstract
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.
5 pages, 4 figures
References in corpus (4)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
- Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra
- Is the Dynamics of Tracking Dark Energy Detectable?