Ellipsoidal Universe Can Solve the Cosmic Microwave Background Quadrupole Problem

2006/06/12 by L. Campanelli, P. Cea, L. Tedesco · 1 voice · 8 citations
Physics and Astronomy · #Amplitude #Anisotropy #Cosmic microwave background #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Decoupling (probability) #Eccentricity (behavior) #Microwave #Observational cosmology #Quadrupole #Radio Astronomy Observations and Technology #Universe #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevlett.97.131302

published as Phys.Rev.Lett.97:131302,2006; Erratum-ibid.97:209903,2006 · 4 pages, 2 figures, minor changes, reference added, to appear in Phys. Rev. Lett

arxiv published 2006/06/12 · arxiv created 2006/09/22 · arxiv updated 2006/09/22 · openalex publication_date 2006/09/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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.

Citations

• Examination of Evidence for a Preferred Axis in the Cosmic Radiation Anisotropy
• Asymmetric inflation: Exact solutions
• Is the Low-ℓMicrowave Background Cosmic?
• Inflation model with lower multipoles of the CMB suppressed
• On the large-angle anomalies of the microwave sky
• Possible explanation to a low CMB quadrupole
• Well-proportioned universes suppress the cosmic microwave background quadrupole
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters

Cited by

• Anisotropic expansion and SNIa: An open issue
• Matter-antimatter asymmetry in generalized coupling theories
• Large‐scale asymmetry between clockwise and counterclockwise galaxies revisited
• Cosmological magnetic fields from inflation and backreaction
• An ellipsoidal universe in the brane world
• Constraints on a Bianchi type I spacetime extension of the standard ΛCDM model
• An exact solution of the observable universe in Bianchi V space–time
• Bianchi-V string cosmological model with dark energy anisotropy

Discussions

• Indeed, very intriguing observation. But let's note at first that in this research only 263 of deep-field galaxies was observed where clear rotation directions were able to detect. Needles to say that [stackexchange, 2 points]