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Lookup NU author(s): Professor Ian Moss,
Dr Chris Graham
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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
Author(s): Moss IG, Graham CM
Publication type: Article
Publication status: Published
Journal: Journal of Cosmology and Astroparticle Physics
ISSN (print): 1475-7516
Publisher: Institute of Physics Publishing Ltd.
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