Abstract

High-resolution observations of the Cosmic Microwave Background (CMB) radiation provide constraints on a large number of extensions to the standard cosmological model, and will play a key role in future cosmological results. Assuming that contamination from Galactic and extra-galactic emission can be kept under control, damping tail data from ground-based CMB experiments inform us on the properties of the primordial scalar fluctuations, on the particle and dark matter content of the Universe, on the Universe evolution and on the epoch of reionization. The Atacama Cosmology Telescope (ACT) is one of the leading experiments currently operating and will be superseded by the new Simons Observatory (SO) from 2021. In this talk I will describe past and future observations from ACT and SO, and show scientific forecasts for the next five years.