Probing Primordial Non-Gaussianity with the Topology of CMB and Large-Scale Structure

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• Chiaki Hikage (University of Cardiff)
• Tuesday 22 January 2008, 16:30-17:30
• Ryle Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact Jane Buckle.

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.

This talk is part of the Cavendish Astrophysics Seminars series.

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