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

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

2008-12-25

arxiv.org/abs/0812.4585v2

Phys.Rev. D79 (2009) 043010

Astronomy and Astrophysics

Astrophysics

9 pages

Scientific paper

10.1103/PhysRevD.79.043010

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%.

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