Scale of Homogeneity of the Universe from WMAP
arXiv:astro-ph/0309320 · doi:10.1103/PhysRevD.68.127301
Abstract
We review the physics of the Grishchuck-Zel'dovich effect which describes the impact of large amplitude, super-horizon gravitational field fluctuations on the Cosmic Microwave Background anisotropy power spectrum. Using the latest determination of the spectrum by WMAP, we infer a lower limit on the present length-scale of such fluctuations of 3927 times the cosmological particle horizon (at the 95% confidence level).
3 pages, 1 figure. Submitted to Phys. Rev. D. Brief Report
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