Primordial Non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure

Figure 15

Effect of the primordial component for different non-Gaussian models on the equilateral configurations of matter bispectrum, , at redshift , as a function of scale, at tree level in PT. In (a) the continuous line shows the initial component (dotted line), the gravity-induced component, (dashed line) and their sum (continuous line). For equilateral configurations the initial component coincides for the local, equilateral, and orthogonal models while it vanishes in the folded model. In (b), (c), and (d), continuous lines show the gravity component alone while dashed lines show the tree-level bispectrum including the primordial component for the local (b), equilateral (c), and orthogonal (d) models assuming the values of corresponding to the 95% C.L. limits as determined by Smith et al. [68] and Senatore et al. [18] from WMAP observations. The shaded area indicates the currently allowed region.

(a)

(b)

(c)

(d)