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Ellipsoidal Universe Can Solve The CMB Quadrupole Problem

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arxiv astro-ph/0606266 v2 pith:HFYLZZKI submitted 2006-06-12 astro-ph gr-qchep-phhep-th

classification astro-phgr-qchep-phhep-th
keywords quadrupoleamplitudeuniverseaffectingallowingangularanisotropyanomaly
verification ladder T0 review T1 audit T2 compute T3 formal
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The recent three-year WMAP data have confirmed the anomaly concerning the low quadrupole amplitude compared to the best-fit \Lambda CDM prediction. We show that, 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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Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Horndeski in motion

    astro-ph.CO 2024-12 conditional novelty 8.0 of 10

    Shift-symmetric Horndeski scalars with a spatial gradient realize moving dark energy, with a universal momentum density T^0i = -Q lambda^i / sqrt(-g) and observable imprints on the CMB dipole and quadrupole.

  2. A Quantitative Framework for Testing the Hubble Tension in a Bianchi Type I Cosmological Background

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    An analytic weak-shear Bianchi I calculation bounds the low-redshift luminosity-distance quadrupole to |Aμ(0.15)|≲2.4×10^-11 mag under BBN shear limits, ruling out shear-only resolution of the Hubble tension.

  3. Polymer Bianchi-I with polymer matter

    gr-qc 2025-09 conditional novelty 5.0 of 10

    In a Bianchi-I universe with polymer quantization of both geometry and a massless scalar, the matter polymer scale shifts the quantum bounce and alters volume and anisotropy evolution.

  4. Testing $\gamma\delta$CDM Model in the Redshift Bins

    astro-ph.CO 2025-01

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