Consistency relations for sharp inflationary non-Gaussian features
  If cosmic inflation suffered tiny time-dependent deviations from the
slow-roll regime, these would induce the existence of small scale-dependent
features imprinted in the primordial spectra, with their shapes and sizes
revealing information about the physics that produced them. Small sharp
features could be suppressed at the level of the two-point correlation
function, making them undetectable in the power spectrum, but could be
amplified at the level of the three-point correlation function, offering us a
window of opportunity to uncover them in the non-Gaussian bispectrum. In this
article, we show that sharp features may be analyzed using only data coming
from the three point correlation function parametrizing primordial
non-Gaussianity. More precisely, we show that if features appear in a
particular non-Gaussian triangle configuration (e.g. equilateral, folded,
squeezed), these must reappear in every other configuration according to a
specific relation allowing us to correlate features across the non-Gaussian
bispectrum. As a result, we offer a method to study scale-dependent features
generated during inflation that depends only on data coming from measurements
of non-Gaussianity, allowing us to omit data from the power spectrum.
