Scale of Homogeneity of the Universe from WMAP

Details Scale of Homogeneity of the Universe from WMAP Scale of Homogeneity of the Universe from WMAP

2003-09-11

arxiv.org/abs/astro-ph/0309320v1

Phys.Rev.D68:127301,2003

Astronomy and Astrophysics

Astrophysics

3 pages, 1 figure. Submitted to Phys. Rev. D. Brief Report

Scientific paper

10.1103/PhysRevD.68.127301

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).

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