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Testing models of inflation with cosmic microwave background non-Gaussianity

Lookup NU author(s): Professor Ian MossORCiD, Dr Chris Graham

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Abstract

Two different predictions for the primordial curvature fluctuation bispectrum are compared through their effects on the cosmic microwave background temperature fluctuations. The first has a local form described with a single parameter fNL. The second is based on a prediction from the warm inflationary scenario, with a different dependence on wavenumber and a parameter fWI. New expressions are obtained for the angular bispectra of the temperature fluctuations and for the estimators used to determine fNL and fWI. The standard deviation of the estimators in an ideal experiment is roughly 5 times larger for fWI than for fNL. Using three-year WMAP (Wilkinson Microwave Anisotropy Probe) data gives limits -375

Publication metadata

Author(s): Moss IG, Graham CM

Publication type: Article

Publication status: Published

Journal: Journal of Cosmology and Astroparticle Physics

Year: 2007

Volume: 2007

Issue: 11

ISSN (print): 1475-7516

ISSN (electronic):

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/1475-7516/2007/11/004

DOI: 10.1088/1475-7516/2007/11/004

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