Cosmic Strings and Their Induced Non-Gaussianities in the Cosmic Microwave Background

Figure 20

Trispectrum geometrical factor for the kite quadrilaterals (represented on the left panel) as a function of the opening angle , and plotted for various values of . The trispectrum is enhanced in the squeezed limit . The bump for corresponds to the parallelogram limit for which the unconnected part is no longer vanishing.

(a)

(b)