Ian G Moss and Christopher M Graham JCAP11(2007)004 doi:10.1088/1475-7516/2007/11/004
Ian G Moss and Christopher M Graham
Show affiliationsTwo 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<fWI<36.8, but there is a possibility of detecting a signal for fWI from the Planck satellite.
E-print Number: 0707.1647
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Issue 11 (November 2007)
Received 24 August 2007, accepted for publication 15 October 2007
Published 6 November 2007
Ian G Moss and Christopher M Graham JCAP11(2007)004
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