Tilted Physics: A Cosmologically Dipole-Modulated Sky

Abstract

Physical constants and cosmological parameters could vary with position. On the largest scales such variations would manifest themselves as gradients across our Hubble volume, leading to dipole-modulation of the cosmic microwave anisotropies. This generically leads to a correlation between adjacent multipoles in the spherical harmonics expansion of the sky, a distinctive signal which should be searched for in future data sets.

4 pages, 3 figures

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• Varying constants, Gravitation and Cosmology
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• Testing physical models for dipolar asymmetry with CMB polarization
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• Testing isotropy in the Two Micron All-Sky redshift survey with information entropy
• Dimensionless cosmology
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• Closing in on the large-scale CMB power asymmetry
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