Ellipsoidal universe can solve the cosmic microwave background quadrupole problem.

@article{Campanelli2006EllipsoidalUC,
  title={Ellipsoidal universe can solve the cosmic microwave background quadrupole problem.},
  author={Leonardo Contri Campanelli and Paolo Cea and Luigi Tedesco},
  journal={Physical review letters},
  year={2006},
  volume={97 13},
  pages={
          131302
        }
}
The recent 3 yr Wilkinson Microwave Anisotropy Probe data have confirmed the anomaly concerning the low quadrupole amplitude compared to the best-fit Lambda-cold dark matter prediction. We show that by allowing the large-scale spatial geometry of our universe to be plane symmetric with eccentricity at decoupling or order 10(-2), the quadrupole amplitude can be drastically reduced without affecting higher multipoles of the angular power spectrum of the temperature anisotropy. 
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References

SHOWING 1-10 OF 28 REFERENCES

Significance of the largest scale CMB fluctuations in WMAP

We investigate anomalies reported in the Cosmic Microwave Background maps from the Wilkinson Microwave Anisotropy Probe (WMAP) satellite on very large angular scales and discuss possible…

Inflation model with lower multipoles of the CMB suppressed

Cosmic microwave background multipole alignments in slab topologies

Several analyses of the microwave sky maps from the Wilkinson Microwave Anisotropy Probe (WMAP) have drawn attention to alignments amongst the low-order multipoles. Amongst the various possible…

Possible explanation to a low CMB quadrupole

The Universe might experience many cycles with different vacua. The slow-roll inflation may be preceded by kinetic-dominated contraction occurring in ``adjacent'' vacua during some cycles. In this…

On the large-angle anomalies of the microwave sky

We apply the multipole vector framework to full-sky maps derived from the first-year Wilkinson Microwave Anisotropy Probe (WMAP) data. We significantly extend our earlier work showing that the two…

THE MAGNETIZED UNIVERSE

Cosmology, high-energy physics and astrophysics are today converging to the study of large scale magnetic fields. While the experimental evidence for the existence of large scale magnetization in…

Evidence of Vorticity and Shear at Large Angular Scales in the WMAP Data: A Violation of Cosmological Isotropy?

Motivated by the large-scale asymmetry observed in the cosmic microwave background sky, we consider a specific class of anisotropic cosmological models—Bianchi type VIIh—and compare them to the WMAP…

How Anisotropic is Our Universe?

Large-scale cosmic microwave background anisotropies in homogeneous, globally anisotropic cosmologies are investigated and primordial anisotropy should have been fine tuned to be less than 10{sup {minus}3} of its natural value in the Planck era.

Low CMB quadrupole from dark energy isocurvature perturbations

We explicate the origin of the temperature quadrupole in the adiabatic dark energy model and explore the mechanism by which scale invariant isocurvature dark energy perturbations can lead to its…

Correlated isocurvature fluctuation in quintessence and suppressed cosmic microwave background anisotropies at low multipoles.

It is shown that, if the primordial fluctuation of the quintessence has a correlation with the adiabatic density fluctuations, the CMB angular power spectrum C( l) at low multipoles can be suppressed without affecting C(l) at high multipoles.