ncku-talk2010-04-29

NCTS (South)

DATE 2010-04-29

TIME 16:10

PLACE R203, 2F, NCTS, NCKU

FIELD Particle

SPEAKER Dr. Tsz Yan Lam - IPMU, University of Tokyo

TITLE Signature of primordial non-Gaussianity on large scale structure

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.

NCTS (South)

DATE	2010-04-29

TIME	16:10

PLACE	R203, 2F, NCTS, NCKU

FIELD	Particle

SPEAKER	Dr. Tsz Yan Lam - IPMU, University of Tokyo

TITLE	Signature of primordial non-Gaussianity on large scale structure

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.