Weak lensing B-modes on all scales as a probe of local isotropy
Cosmology and Nongalactic Astrophysics
2015-03-20 v3 General Relativity and Quantum Cosmology
Abstract
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.
Keywords
Cite
@article{arxiv.1203.6029,
title = {Weak lensing B-modes on all scales as a probe of local isotropy},
author = {Cyril Pitrou and Jean-Philippe Uzan and Thiago S. Pereira},
journal= {arXiv preprint arXiv:1203.6029},
year = {2015}
}
Comments
10 pages, 2 figures. Replaced to match published version