Non-parametric reconstruction of the primordial power spectrum at horizon scales from WMAP data

Abstract

We extend to large scales a method proposed in previous work that reconstructs nonparametrically the primordial power spectrum from cosmic microwave background data at high resolution. The improvement is necessary to account for the nongaussianity of the Wilkinson Microwave Anisotropy Probe (WMAP) likelihood due primarily to cosmic variance. We assume the… (More)

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