Special seminar | Optimizing future CMB observatories and measuring galaxy cluster motions | Patricio Gallardo |Cornell University

Mon, Dec 14, 2020, 10:00 am
Via Zoom

Ground-based high-throughput millimeter-wave cosmic microwave background (CMB) experiments have provided invaluable clues of the history and composition of the universe. Future surveys will expand our understanding of inflation, the composition and distribution of dark matter in the universe, and will provide an unprecedented view of the transient microwave sky. Current CMB experiments keep pushing the limits of depth and coverage of the millimeter-wavelength sky, enabling evermore precise cosmological measurements and allowing new observations of astrophysical processes. Combining datasets from CMB experiments with optical surveys enables cross-correlation studies, leveraging synergistic opportunities out of reach from single-experiment datasets. The diverse and broad science enabled by these experiments has motivated the combined effort of current and future CMB experiments like the Atacama Cosmology Telescope (ACT), the Simons Observatory and CMB-S4.

In this talk I review studies on millimeter-wave optics that aid the design of future extremely high-throughput CMB surveys like CMB-S4, where two six-meter class telescope concepts are being considered: a crossed Dragone design similar to the Simons Observatory and an innovative three mirror anastigmatic system. These telescopes will be populated with 85 closely packed optic tubes to deliver unprecedented mapping speeds. I will also discuss how CMB experiment datasets can be used in conjunction with optical surveys to extract information about the large-scale movement of galaxy clusters via the pairwise kinematic Sunyaev-Zeldovich effect, the Doppler shifted inverse Compton-scattered light from the CMB, and its detection with data from ACT and the Sloan Digital Sky Survey.

Via Zoom: https://princeton.zoom.us/j/95143153872