Updating constraints on inflationary features in the primordial power spectrum with the Planck data

Abstract

We present new constraints on possible features in the primordial inflationary density perturbation power spectrum in light of the recent cosmic microwave background anisotropy measurements from the Planck satellite. We found that the Planck data hints for the presence of features in two different ranges of angular scales, corresponding to multipoles 10<ℓ<60 and 150<ℓ<300, with a decrease in the best-fit χ² value with respect to the featureless “vanilla” ΛCDM model of Δχ²≃9 in both cases.