Non-gaussianity and large-scale structure surveys

Monday, June 7th, 14:30 - Seminar Room

Speaker: Licia Verde (ICC, Universitat de Barcelona)

Abstract: It has recently been shown that a popular type of primordial non-gaussianity affects drastically the clustering of extrema such as massive dark matter halos. This effect goes under the name of non-gaussian halo bias. Since galaxies, especially at high redshfits, are expected to trace such halos,

large-scale structure surveys offer therefore a new window into primordial non-Gaussianity and the mechanism of generation of perturbations. In particular, even small primordial non-Gaussianity can change the very large-scale clustering to a detectable level. I will review the non-Gaussian halo bias effect, discuss current constraints and present forecasts for future surveys.



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