How to model lensing due to the small-scale structure of the Universe?

Series: 
The London Relativity and Cosmology Seminar
Speaker: 
Pierre Fleury (Paris)
Date: 
October 14th, 2015 at 15:00
Room: 
See Talk Details
Abstract: 

Cosmological observations are usually interpreted as if light propagated through a smooth, fluid-filled Universe. However, when point-like sources—such as supernovae—are at stake, the associated light beams are so narrow that the clumpy small-scale structure of our Universe may become more relevant that its large-scale structure. In this talk, I will present two approaches for modelling and quantifying the effect of small scales on light propagation: Swiss-cheese models on the one hand, and stochastic techniques on the other hand. - G. O. Jones Room 510