Band-power reconstruction of the primordial fluctuation spectrum by the maximum likelihood reconstruction method

Abstract

The primordial curvature fluctuation spectrum is reconstructed by the maximum likelihood reconstruction method using the five-year Wilkinson Microwave Anisotropy Probe data of the cosmic microwave background temperature anisotropy. We apply the covariance matrix analysis and decompose the reconstructed spectrum into statistically independent band-powers. The prominent peak off a simple power-law spectrum found in our previous analysis turn out to be a $3.3\sigma$ deviation. From the statistics of primordial spectra reconstructed from mock observations, the probability that a primordial spectrum including such excess is realized in a power-law model is estimated to be about 2%.

9 pages

References in corpus (9)

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Cited by in corpus (5)

• CMB polarization features from inflation versus reionization
• Primordial power spectrum from Planck
• Reconstruction of the Primordial Power Spectrum using Temperature and Polarisation Data from Multiple Experiments
• Nongaussianity from Particle Production During Inflation
• Changes in the halo formation rates due to features in the primordial spectrum