A test of the Suyama–Yamaguchi inequality from weak lensing

摘要: We investigate the weak lensing signature of primordial non-Gaussianities local type by constraining magnitude convergence bi- and trispectra expected for EUCLID survey. Starting from expressions spectra, bispectra trispectra, whose relative magnitudes we as a function scale, compute their respective signal to noise ratios relating polyspectra's amplitude Gaussian covariance using Monte-Carlo technique carrying out configuration space integrations. In computing Fisher-matrix on non-Gaussianity parameters f_nl, g_nl tau_nl with very similar technique, can derive Bayesian evidences violation Suyama-Yamaguchi relation tau_nl>=(6 f_nl/5)^2 true f_nl tau_nl-values show that be probed down levels f_nl~10^2 tau_nl~10^5. related study, analytical probability density SY-relation is exactly fulfilled, required models in which any one field generates perturbations. conclude an outlook tomographic surveys.