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SUMMARY: Cosmology with weak lensing: shapes\, sizes and baryons - Alan He
 avens (Imperial College London)
DTSTART:20131202T130000Z
DTEND:20131202T140000Z
UID:TALK47677@talks.cam.ac.uk
CONTACT:33215
DESCRIPTION:Cosmic shear is a relatively new discipline\, but offers great
  potential for measuring Dark Energy properties and for testing Einstein's
  theory of gravity.  It is one of the main scientific methods proposed for
  ESA's Euclid imaging survey.  In this talk I argue that another effect of
  gravitational lensing\, cosmic size magnfication\, which has received rel
 atively little attention\, is a promising extra source of signal.  It refe
 rs to the changes in size of distant galaxies\, and it can be used in a co
 mplementary fashion to shear\, adding signal-to-noise\, or provide an alte
 rnative analysis with different systematic effects\, using the same basic 
 data.  In this talk\, I present the ideas\, challenges and potential\, and
  also show new results from a full 3D lensing analysis of the CFHTLenS sur
 vey\, showing tension with Planck results and a possible resolution.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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