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z - KICP Workshops - University of Chicago

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8<br />

II. Weak Lensing: Cosmic Shear<br />

Observer<br />

Dark matter halos<br />

• Spatially coherent shear pattern, ~1% distortion<br />

Background<br />

sources<br />

• Radial distances depend on expansion history <strong>of</strong> Universe<br />

• Foreground mass distribution depends on growth <strong>of</strong> structure

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