Discriminating weak lensing from intrinsic spin correlations using the curl-gradient decomposition

ASTROPHYSICAL JOURNAL, no. 1 (2002): 20-27

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The distortion field defined by the ellipticities of galaxy shapes as projected on the sky can be uniquely decomposed into a gradient and a curl component. If the observed ellipticities are induced by weak gravitational lensing, then the distortion field is curl-free. Here we show that, in contrast, the distortion field resulting from int...更多

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