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18 February 2025
 
  » arxiv » 1109.0067

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Uncorrelated estimates of the primordial power spectrum
Zong-Kuan Guo ; Yuan-Zhong Zhang ;
Date 1 Sep 2011
AbstractMeasuring the deviation from scale invariance of the primordial power spectrum is a critical test of inflation. In this paper we apply the localized principle component analysis to constrain the primordial power spectrum of curvature perturbations in five bins of wavenumber by the cosmic microwave background data, including the 7-year Wilkinson Microwave Anisotropy Probe data and the Atacama Cosmology Telescope data. We find that the Harrison-Zel’dovich spectrum is disfavored at 95% confidence level. We also forecast the sensitivity and constraints achievable by the Planck experiment by performing Monte Carlo studies on simulated data. Planck could significantly improve the constraints on the primordial power spectrum.
Source arXiv, 1109.0067
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