Extended analysis of CMB constraints on non-Gaussianity in isocurvature perturbations
arXiv:1212.6001 · doi:10.1088/1475-7516/2013/03/020
Abstract
We study CMB constraints on non-Gaussianity from isocurvature perturbations of general types. Specifically, we study CDM/neutrino isocurvature perturbations which are uncorrelated or totally correlated with adiabatic ones. Using the data from the WMAP 7-year observation at V and W bands, we obtained optimal constraints on the nonlinearity parameters of adiabatic and isocurvature perturbations. Our result shows that primordial perturbations are consistent with Gaussian ones at around 2 sigma level for above mentioned isocurvature modes.
23 pages, 3 figures, 5 tables
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