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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 Doroshkevichâ€˜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. |