two gamma event

Wise
Nov
2017

Mark Wise

The Galaxy halo bispectrum and primordial non-Gaussianities

Nov. 13, 2017

pdf file mp4 file

Abstract: Primordial non-Gaussian density perturbations can give rise to very unusual behavior for the power spectrum and bispectrum of biased objects like galaxies. For example, the galactic power spectrum could go as 1/q^3 as small wave-vectors q. I discuss this effect within the context of quasi-single field inflation making some estimates for how small the wave-vector q has to be for this behavior to dominate over the usual approximately Harrison-Zeldovich form for the power spectrum.

Time: 1:30pm-2:30pm

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