Advancing CMB Cosmology: Advanced ACTPol, Simons Observatory, and CMB-S4

Oct 15, 2020 - 11:00 am to 12:00 pm
Jeff McMahon (University of Chicago) via zoom

Zoom Recording

Measurements of the cosmic microwave background (CMB) are a powerful probe of the origin, contents, and evolution of our Universe.  CMB observations have shown our universe to be spatially flat, constrained inflationary and alternative theories of the primordial universe, and provided a cornerstone for our precision knowledge of the Lambda-CDM model.  CMB instruments continue to evolve according to a Moore’s law under which the mapping speed of experiments improves by roughly an order of magnitude every five years.    The current generation of ground based experiments, including Advanced ACTPol, have already produced many leading CMB measurements and are contributing to our understandings of tensions including that in measurements of the Hubble constant.  We are approaching a new era where ground based measurements will provide the tightest constraints on many cosmological parameters.  These constraints will rapidly improve over the coming decade as Simons Observatory and CMB-S4 come online.   These measurements will provide new insights into the early universe, dark energy, dark matter, neutrino masses, a variety of astrophysical phenomena; and enable searches for new surprises.  In this talk I present recent results from the Advanced ACTPol experiment and the next generations of CMB experiments: Simons Observatory and CMB-S4.