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SUMMARY:Following light across the Universe (to test gravity and do other 
 stuff) - Baojiu Li (Durham)
DTSTART:20151026T130000Z
DTEND:20151026T140000Z
UID:TALK60811@talks.cam.ac.uk
CONTACT:Tommaso Giannantonio
DESCRIPTION:Some of the strongest constraints on modified gravity theories
  by cosmology come from their effects on the propagation of light\, exampl
 es of which include weak gravitational lensing\, the integrated Sachs-Wolf
 e effect and so on.  I will show some recent results of constraining gravi
 ty using these observables\, and use those to motivate the necessity of a 
 code that can do ray tracing on the fly of numerical simulations. Then I w
 ill describe a recent attempt to develop such a code\, its algorithms and 
 implementation\, and some of its tests. Potential applications of the code
 \, both in and out of the standard paradigm\, will be mentioned briefly.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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