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Primordial non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure

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arxiv 1001.4707 v1 pith:XMC6ZBJR submitted 2010-01-25 astro-ph.CO

Primordial non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure

M. Liguori , E. Sefusatti , J.R. Fergusson , E.P.S. Shellard This is my paper
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keywords bispectrumbackgroundcosmicmicrowavefuturelarge-scalemeasurementsnon-gaussian
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The most direct probe of non-Gaussian initial conditions has come from bispectrum measurements of temperature fluctuations in the Cosmic Microwave Background and of the matter and galaxy distribution at large scales. Such bispectrum estimators are expected to continue to provide the best constraints on the non-Gaussian parameters in future observations. We review and compare the theoretical and observational problems, current results and future prospects for the detection of a non-vanishing primordial component in the bispectrum of the Cosmic Microwave Background and large-scale structure, and the relation to specific predictions from different inflationary models.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Dissecting the Scalar Cosmological Collider with the Cosmic Microwave Background

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    A joint Bayesian fit of the multi-field inflationary Lagrangian to Planck bispectrum data finds no cosmological collider signal (max Δχ²=5.3) and shows weak-mixing template searches are invalid except at the smallest masses.

  2. Pushing the Primordial Frontier: Cosmological Collider Signatures at Strong Mixing

    astro-ph.CO 2026-07 conditional novelty 7.0

    Exact analytic squeezed-limit bispectra for strongly mixed two-field inflation, nonperturbative in the curvature-isocurvature mixing λ.

  3. Euclid preparation: Testing multi-field inflation with galaxy power spectrum and bispectrum

    astro-ph.CO 2026-05 conditional novelty 5.0

    Validates redshift-space power spectrum and bispectrum analysis on Abacus-PNG mocks to recover unbiased f_NL constraints for Euclid spectroscopic sample.

  4. The DESI Experiment Part I: Science,Targeting, and Survey Design

    astro-ph.IM 2016-10 unverdicted novelty 4.0

    DESI will target luminous red galaxies to z=1, emission-line galaxies to z=1.7, quasars for tracers and Ly-alpha forest at 2.1<z<3.5, plus a bright galaxy survey, to obtain more than 30 million redshifts for BAO and m...