The decoupling of scalar-modes from a linearly perturbed dust-filled Bianchi type I model
arXiv:1504.01900 · doi:10.1088/0256-307X/31/1/010402
Abstract
We study linear perturbations about a dust filled Bianchi Type I model with the vorticity set to zero. In comparison to linear perturbations about FLRW models, modes of perturbations about Bianchi type I models are coupled. We find that the tensor that represents the background shear needs to be degenerate in order for the scalar-mode perturbations to decouple from the rest of the flow.
arXiv comment4 pages
References in corpus (14)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
- Asymmetries in the CMB anisotropy field
- Detection of non-Gaussianity in the WMAP 1-year data using spherical wavelets
- The axis of evil
- Is the low-l microwave background cosmic?
- Testing the cosmological principle of isotropy: local power spectrum estimates of the WMAP data
- General Relativistic Dynamics of Irrotational Dust: Cosmological Implications
- Testing for Non-Gaussianity in the Wilkinson Microwave Anisotropy Probe Data: Minkowski Functionals and the Length of the Skeleton
- Asymmetries in the local curvature of the WMAP data
- The Virgo Alignment Puzzle in Propagation of Radiation on Cosmological Scales
- The N-point correlation functions of the first-year Wilkinson Microwave Anisotropy Probe sky maps
- Dynamics of Silent Universes
- Large-scale power in the CMB and new physics: an analysis using Bayesian model comparison
- Consistency of dust solutions with div H=0