Anisotropic dark energy and ellipsoidal universe
arXiv:1103.2658 · doi:10.1142/S021827181101927X
Abstract
A cosmological model with anisotropic dark energy is analyzed. The amount of deviation from isotropy of the equation of state of dark energy, the skewness δ, generates an anisotropization of the large-scale geometry of the Universe, quantifiable by means of the actual shear Σ_0. Requiring that the level of cosmic anisotropization at the time of decoupling is such to solve the "quadrupole problem" of cosmic microwave background radiation, we find that |δ| \sim 10^{-4} and |Σ_0| \sim 10^{-5}, compatible with existing limits derived from the magnitude-redshift data on type Ia supernovae.
10 pages, 3 figures. Revised version to match published version. References added
References in corpus (13)
- Cosmic Microwave Background Quadrupole and Ellipsoidal Universe
- Anisotropic Cosmological Constant and the CMB Quadrupole Anomaly
- A Model of Universe Anisotropization
- Correlating anomalies of the microwave sky: The Good, the Evil and the Axis
- CMB quadrupole suppression: I. Initial conditions of inflationary perturbations
- The CMB Quadrupole depression produced by early fast-roll inflation: MCMC analysis of WMAP and SDSS data
- CMB quadrupole suppression: II. The early fast roll stage
- Cosmology with moving dark energy and the CMB quadrupole
- A Complete Statistical Analysis for the Quadrupole Amplitude in an Ellipsoidal Universe
- Cosmic Parallax: possibility of detecting anisotropic expansion of the universe by very accurate astrometry measurements
- Possible extensions of the standard cosmological model: anisotropy, rotation, and magnetic field
- Rogues' gallery: the full freedom of the Bianchi CMB anomalies
- Contamination cannot explain the lack of large-scale power in the cosmic microwave background radiation