Speaker: Thomas Tram

Upcoming large scale structure surveys will map the structure of the Universe on very large scales where General Relativistic (GR) effects become important. In order to extract information from these surveys, we must have a fast and accurate analytic model. This is well known on small scales where the precision of Newtonian N-body codes is constantly being pushed but it is equally true at large scales. In this talk I will present numerical and analytic computations of the matter bispectrum generated from Gaussian initial conditions, i.e. the intrinsic matter bispectrum. From the point of view of non-Gaussianity from inflation, this intrinsic matter bispectrum acts as a foreground which must be subtracted in order to extract the primordial non-Gaussianity.