Speaker: Emma Beynon
Location: NAM2012
Abstract:
Large forthcoming surveys will allow weak lensing to constrain cosmology with great precision. Lensing measures structure growth as well as expansion, and can therefore be used to break parameter degeneracies which exist with measurements from other probes (e.g. SNe, CMB).

Here I present constraint predictions for modified gravities, interacting dark energy models and unified dark matter models for weak lensing with DES and Euclid, demonstrating how tightly we will be able to constrain cosmological models with these forthcoming surveys. I will discuss the importance of correctly modelling the non-linear matter power spectrum, and how using an incorrect prescription can lead to overestimation of the discriminatory power of lensing at small scales. I will also discuss the importance of including the full covariance matrix of lensing observations for these future surveys, in order to obtain accurate predictions.