Department of Physics & Astronomy

Fall 2008 Colloquia

 

Henk Hoekstra

Henk Hoekstra

Leiden University
Netherlands
Weak Lensing by Large Scale Structure
November 10, 2008, 4PM, Thornton 411

Intervening structures in the universe give rise to small distortions in the shapes of distant galaxies. By measuring this tiny coherent signal, we can study the mass distribution in the universe directly, without relying on baryonic tracers. This makes weak lensing by large- scale structures a powerful probe of cosmology and a promising tool to constrain the properties of dark energy. I will review the topic of "cosmic shear" and discuss how the signal is extracted from the data. I will present some recent results and discuss future directions.
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