Bayesian inflationary reconstructions from <i>Planck</i> 2018 data
Bayesian inflationary reconstructions from <i>Planck</i> 2018 data
We present three nonparametric Bayesian primordial reconstructions using Planck 2018 polarization data: linear spline primordial power spectrum reconstructions, cubic spline inflationary potential reconstructions, and sharp-featured primordial power spectrum reconstructions. All three methods conditionally show hints of an oscillatory feature in the primordial power spectrum in the multipole range $\ensuremath{\ell}\ensuremath{\sim}20$ to …