Beyond the two-point correlation: Constraining primordial non-Gaussianity with density-perturbation moments

Open Access

Fig. 5.

Correlation matrix ( $C_{ij} / \sqrt{C_{ii} C_{jj}}$ $C_{ij}/\sqrt{C_{ii}C_{jj}}$ ) computed from 125 f_NL = 0 simulations using Eq. (21). The matrix here was derived using the full observation vector out to s_max = 395 h⁻¹ Mpc (54 total bins, 18 per moment). Dashed lines separate the blocks corresponding to different moments in the observation vector, ${\hat{μ}}_{i}$ $\hat{\mu}_i$ .

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