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Structure of the cosmic microwave background


We predict the structure expected in the cosmic microwave background over large angular scales in realistic anisotropic and inhomogeneous universes. In a homogeneous anisotropic universe we find that there exist two possibilities, a quadrupole or a hotspot pattern with and without dipole contributions. A hotspot allows a direct observational test of an open universe. We show how infinite wavelength inhomogeneous perturbations of the Friedman universe can be represented as ensembles of different homogeneous universes.

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Barrow, J., Juszkiewicz, R. & Sonoda, D. Structure of the cosmic microwave background. Nature 305, 397–402 (1983).

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