arxiv: 1203.6029 · v3 · pith:7USBIDPOnew · submitted 2012-03-27 · 🌌 astro-ph.CO · gr-qc

Weak lensing B-modes on all scales as a probe of local isotropy

Cyril Pitrou , Jean-Philippe Uzan , Thiago S. Pereira This is my paper

classification 🌌 astro-ph.CO gr-qc

keywords b-modesisotropylocalscalesspacetimeangulararticleassuming

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This article derives a multipolar hierarchy for the propagation of the weak-lensing shear and convergence in a general spacetime. The origin of B-modes, in particular on large angular scales, is related to the local isotropy of space. Known results assuming a Friedmann-Lema\^itre background are naturally recovered. The example of a Bianchi I spacetime illustrates our formalism and its implications for future observations are stressed.

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Weak lensing B-modes on all scales as a probe of local isotropy

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