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Weak lensing in non-statistically isotropic universes

The Bipolar Spherical Harmonics (BipoSH) form a natural basis to study the CMB two point correlation function in a non-statistically isotropic (non-SI) universe. The coefficients of expansion in this basis are a generalisation of the well known CMB angular power spectrum and contain complete information of the statistical properties of a non-SI but Gaussian random CMB sky. We use these coefficients to describe the weak lensing of CMB photons in a non-SI universe. Finally we show that the results reduce to the standard weak lensing results in the isotropic limit.

preprint2015arXivOpen access
Moumita AichAditya RottiTarun Souradeep
astro-ph.CO
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Moumita AichAditya RottiTarun Souradeep

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