Schedule Mar 18, 2011
Primordial Non-Gaussianity and Galaxy Clusters
Dragan Huterer (Univ. Michigan)

I first review the history of the measurements of non-Gaussianity from the cosmic microwave background anisotropies in the universe over the past two decades. I then present results from recent (2008) work where we found that the bias of dark matter halos takes strong scale dependence in non-Gaussian cosmological models. Therefore, measurements of scale dependence of clustering of galaxies and other tracers, can - and do - constrain primordial non-Gaussianity about two orders of magnitude better than previously thought possible using the large-scale structure. I will discuss prospects for future constraints on non-Gaussianity using this method. I will also present a brief overview of work studying recent claims that the number of high-redshift, high-mass galaxy clusters (the 'pink elephant' clusters) is in disagreement with the standard cosmological model predictions with Gaussian initial conditions.

Begin Flash full motion video, or Flash lower bandwidth video. (Or, right-click to download the 3gp file.)

Begin QuickTime full motion movie or Quicktime lower bandwidth movie.
(Or, right-click to download the lower bandwidth movie.) (Or, right-click to download the podcast.)

Begin streaming RealMedia. (Or, right-click to download the audio file.)

To begin viewing slides, click on the first slide below. (Or, view as pdf.)


[01] [02] [03] [04] [05] [06] [07] [08] [09] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29]

Author entry (protected)