Ellipsoidal universe can solve the cosmic microwave background quadrupole problem.
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.
Campanelli
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INFN-Sezione di Ferrara, and Dipartimento di Fisica, Università di Ferrara, I-44100 Ferrara, Italy. campanelli@fe.infn.it
Cea
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Tedesco
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