ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Tsz Yan Lam (IPMU)
Title: Signature of primordial non-Gaussianity on large scale structure
Date: Thu, Dec 03, 2009, 13:30 - 15:00
Place: Seminar Room at IPMU Prefab. B
Related File: 185.pdf
Abstract: Cosmological probes of primordial non-Gaussianity have recently attracted much attention due to its ability to discriminate between different inflationary models. In this talk I will present the signatures of primordial non-Gaussianity on large scale structure. I will first describe its effect on the distribution of the underlying dark matter field. I will show how to generalize Doroshkevich's celebrated formulae for the eigenvalues of the initial shear field assoicated with Gaussian statistics to the local non-Gaussian f_{nl} model. Then I will discuss how to extend the excursion set approach to compute the halo mass function when the primordial perturbation is non-Gaussian. The result will then compare with measurements from N-body simulations.
Contact: Maeda