Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-09-26
Phys.Rev.D78:123002,2008
Astronomy and Astrophysics
Astrophysics
9pages
Scientific paper
10.1103/PhysRevD.78.123002
The primordial curvature fluctuation spectrum is reconstructed by the cosmic inversion method using the five-year WMAP 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 statistically significant deviation from a simple power-law spectrum suggested by the analysis of the first-year data is not found in the five-year data except possibly at one point near the border of the wavenumber domain where accurate reconstruction is possible.
Nagata Ryo
Yokoyama Jun'ichi
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