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Cosmological Perturbations at Second Order and Recombination Perturbed
Leonardo Senatore, Svetlin Tassev, Matias Zaldarriaga
We derive the full set of second-order equations governing the evolution of cosmological perturbations, including the effects of the first-order electron number density perturbatio…
Non-Gaussianities from Perturbing Recombination
Leonardo Senatore, Svetlin Tassev, Matias Zaldarriaga
We approximately compute the bispectrum induced on the CMB temperature by fluctuations in the standard recombination epoch. Of all the second order sources that can induce non-Gaus…
CMBPol Mission Concept Study: Probing Inflation with CMB Polarization
Daniel Baumann, Mark G. Jackson, Peter Adshead +56
We summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes of the physics of inflation. We focus on the prospects for using CMB measu…
Limits on f_NL parameters from WMAP 3yr data
Paolo Creminelli, Leonardo Senatore, Matias Zaldarriaga +1
We analyze the 3-year WMAP data and look for a deviation from Gaussianity in the form of a 3-point function that has either of the two theoretically motivated shapes: local and equ…
Estimators for local non-Gaussianities
Paolo Creminelli, Leonardo Senatore, Matias Zaldarriaga
We study the Likelihood function of data given f_NL for the so-called local type of non-Gaussianity. In this case the curvature perturbation is a non-linear function, local in real…
Limits on non-Gaussianities from WMAP data
Paolo Creminelli, Alberto Nicolis, Leonardo Senatore +2
We develop a method to constrain the level of non-Gaussianity of density perturbations when the 3-point function is of the "equilateral" type. Departures from Gaussianity of this f…