Perex
Bouncing models followed by an inflationary phase not only yield nearly scale-invariant
fluctuation spectra but also offer a means to mitigate the large-scale anomalies present in the Cosmic Microwave Background (CMB). This mitigation is contingent upon the introduction of substantial non-Gaussianity on very large scales, which decays exponentially and becomes small deep within the horizon. For this reason, this non-Gaussianity was thought to be invisible in observational data, as cosmological observations are subject to cosmic variance. In this talk, I will explain how such models can be excluded with high significance by the Planck data if their non-Gaussianity is enough to appreciably alleviate the CMB large-scale anomalies. Furthermore, this result underscores the sensitivity of the Planck data to scales beyond the pivot scale.