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Advances in Astronomy
Volume 2010, Article ID 980523, 64 pages
Review Article

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

1Department of Applied Mathematics and Theoretical Physics, Centre for Theoretical Cosmology, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
2Institut de Physique Théorique, Commissariat à l'Énergie Atomique, 91191 Gif-sur-Yvette, France

Received 5 February 2010; Accepted 12 May 2010

Academic Editor: Dragan Huterer

Copyright © 2010 Michele Liguori et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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 nonvanishing primordial component in the bispectrum of the Cosmic Microwave Background and large-scale structure, and the relation to specific predictions from different inflationary models.