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Chiaki Hikage (University of Cardiff)
Tuesday 22 January 2008, 16:30-17:30
Probing Primordial Non-Gaussianity with the Topology of CMB and Large-Scale Structure
- đ¤ Speaker: Chiaki Hikage (University of Cardiff)
- đ Date & Time: Tuesday 22 January 2008, 16:30 - 17:30
- đ Venue: Ryle Seminar Room, Cavendish Laboratory
Abstract
Non-Gaussianity in primordial density fields is known to be a unique probe to discriminate inflationary models. I present the effect of primordial non-Gaussianity on CMB temperature anisotropy and large-scale structure with a focus on their topological properties quantitatively characterized by the Minkowski functionals. Deriving analytical formulae of the Minkowski Functionals from primordial non-Gaussianity, I apply it to compare with WMAP data and then give a new constraint on a usual non-linear coupling parameter fNL. I also present the effect of primordial non-Gaussianity on the development of large-scale structure using N-body simulations.
Series This talk is part of the Cavendish Astrophysics Seminars series.
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