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New Optimised Estimators for the Primordial Trispectrum
Dipak Munshi, Alan Heavens, Asantha Cooray +3
Cosmic microwave background studies of non-Gaussianity involving higher-order multispectra can distinguish between early universe theories that predict nearly identical power spect…
Non-Gaussianity in WMAP Data Due to the Correlation of CMB Lensing Potential with Secondary Anisotropies
Erminia Calabrese, Joseph Smidt, Alexandre Amblard +5
We measure the skewness power spectrum of the Cosmic Microwave Background (CMB) anisotropies optimized for a detection of the secondary bispectrum generated by the correlation of t…
Secondary non-Gaussianity and Cross-Correlation Analysis
Dipak Munshi, Patrick Valageas, Asantha Cooray +1
We develop optimised estimators of two sorts of power spectra for fields defined on the sky, in the presence of partial sky coverage. The first is the cross-power spectrum of two f…
Adiabatic versus Isocurvature Non--Gaussianity
Chiaki Hikage, Dipak Munshi, Alan Heavens +1
We study the extent to which one can distinguish primordial non--Gaussianity (NG) arising from adiabatic and isocurvature perturbations. We make a joint analysis of different NG mo…
A New Approach to Probing Primordial Non-Gaussianity
Dipak Munshi, Alan Heavens
We address the dual challenge of estimating deviations from Gaussianity arising in models of the Early Universe, whilst retaining information necessary to assess whether a detectio…