Weak Lensing By Nearby Structures

Details Weak Lensing By Nearby Structures Weak Lensing By Nearby Structures

1994-02-22

arxiv.org/abs/cond-mat/9402094v1

Physics

Condensed Matter

14 pages, phyzzx

Scientific paper

10.1086/187389

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 ${\cal O}(0.2%\Omega)$ with coherence over scales of tens of square degrees. The Sloan Survey, which will image $\gsim 10^4$ galaxies $\rm deg^{-2}$ over $\pi$ 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 $\Omega$ in local structures and compare this value to that derived from a variety of other techniques.

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