Spatial Curvature at the Sound Horizon

Guus Avis, Sadra Jazayeri, Enrico Pajer +1

The effect of spatial curvature on primordial perturbations is controlled by ${\Omega }_{K,0}/c_s^2$, where ${\Omega }_{K,0}$ is today's fractional density of spatial curvature and $ c_{s}…