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Weak Lensing By Nearby Structures

Andrew Gould·Jens Villumsen
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Abstract

Weak gravitational lensing due to nearby structures, such as the Coma cluster, and the Local Supercluster can be expected to polarize images of distant galaxies by ${\cal O}(0.2%Ω)$ with coherence over scales of tens of square degrees. The Sloan Survey, which will image $\gsim 10^4$ galaxies $\rm deg^{-2}$ over $π$ steradians, should be sensitive to polarizations of $\sim 0.1% A^{-1/2}$, where $A$ is the area in square degrees. By measuring the polarization, one could determine $Ω$ in local structures and compare this value to that derived from a variety of other techniques.

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Andrew Gould, Jens Villumsen. 1994-02-22. Weak Lensing By Nearby Structures. https://doi.org/10.1086/187389

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