From December 20, 2018 13:15 until December 20, 2018 13:45
At Seminar Room
The cosmic microwave background (CMB) has proven to be a powerful probe of the physics and cosmology of our universe. CMB observations are helping to address fundamental questions, such as the nature of dark energy and dark matter, and are being used to constrain the physics of inflation at energies a trillion times higher than the Large Hadron Collider. Recent measurements have led to exciting progress in several areas, from improved constraints on cosmological parameters via CMB polarization to the discovery of galaxy clusters and characterization of their large-scale velocities. One focus of our current research is combining measurements from the Atacama Cosmology Telescope (ACT) with optical galaxy surveys to characterize pairwise galaxy cluster velocities. Beyond the ACT, the CCAT-prime and Simons Observatory projects are building six-meter-aperture ultra-high optical throughput telescopes to illuminate many times more microwave detectors than existing telescopes. With CCAT-prime we plan to pursue new galaxy cluster and carbon intensity mapping measurements to understand the epoch of reionization in addition to CMB research. These high-throughput telescopes are designed to work together with smaller aperture telescopes in a next generation “Stage-IV” CMB survey, which we will use to probe models of inflation, light relics, and cosmic structure with unprecedented precision.