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SUMMARY:Weak lensing by large scale structure - Henk Hoekstra\, Leiden
DTSTART:20091029T163000Z
DTEND:20091029T173000Z
UID:TALK19397@talks.cam.ac.uk
CONTACT:scott chapman
DESCRIPTION:Intervening structures in the universe give rise to small dist
 ortions  \nin the shapes of distant galaxies. By measuring this tiny coher
 ent  \nsignal\, we can study the mass distribution in the universe directl
 y\,  \nwithout relying on baryonic tracers. This makes weak lensing by lar
 ge- \nscale structures a powerful probe of cosmology. I will review the  \
 ntopic of cosmic shear and discuss how the signal is extracted from the  \
 ndata. I will present results from recent surveys\, most notably the  \nCF
 HT Legacy Survey and COSMOS. Finally I will discuss what will be  \nrequir
 ed to significantly improve constraints on the properties of  \ndark energ
 y.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 4:00 pm)
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