Phys. Rev. Lett. 97, 131302 (2006) [4 pages]

Ellipsoidal Universe Can Solve the Cosmic Microwave Background Quadrupole Problem

Abstract

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L. Campanelli^1,2,*, P. Cea^3,4,†, and L. Tedesco^3,4,‡
¹INFN—Sezione di Ferrara, I-44100 Ferrara, Italy
²Dipartimento di Fisica, Università di Ferrara, I-44100 Ferrara, Italy
³INFN—Sezione di Bari, I-70126 Bari, Italy
⁴Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy

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Received 12 June 2006; published 28 September 2006

The recent 3 yr Wilkinson Microwave Anisotropy Probe data have confirmed the anomaly concerning the low quadrupole amplitude compared to the best-fit Λ–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.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.97.131302

DOI:

10.1103/PhysRevLett.97.131302

PACS:

98.70.Vc, 98.80.Es

^*Electronic address: campanelli@fe.infn.it

^†Electronic address: paolo.cea@ba.infn.it

^‡Electronic address: luigi.tedesco@ba.infn.it

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Phys. Rev. Lett. 97, 131302 (2006) [4 pages]

Ellipsoidal Universe Can Solve the Cosmic Microwave Background Quadrupole Problem

See Also