Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session Q12: CMB MiniSymposium |
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Sponsoring Units: DAP DPF Chair: Clement Pryke, University of Minnesota Room: Sheraton Plaza Court 1 |
Monday, April 15, 2019 10:45AM - 11:03AM |
Q12.00001: CMB theory background Raphael Flauger Observations of the cosmic microwave background have been key to our understanding of the early universe. The cosmic microwave background also contains invaluable information about particle physics that can be revealed through precision observations of the polarization anisotropies. In this talk I will review the key CMB observables most relevant to the particle physics community. |
Monday, April 15, 2019 11:03AM - 11:30AM |
Q12.00002: South Pole CMB measurements: Results from BICEP/Keck and the South Pole Telescope, and near term prospects W.L. Kimmy Wu The BICEP/Keck Array (BK) and the South Pole Telescope (SPT) are two cosmic microwave background (CMB) experiments located at the South Pole. The BK telescopes are small aperture refractors that focus on resolving the degree-scale B-mode feature imprinted on the CMB by inflationary gravitational waves, whose amplitude is related to the energy scale of inflation in simple inflation models. The South Pole Telescope is a 10m telescope with ~1 arcmin resolution imaging broad scales of cosmic structures including galaxy clusters. In this talk, I will give an overview of both experiments' latest results, including the tightest constraints on the tensor-to-scalar ratio r to-date, measurements of CMB lensing, and cosmology from CMB spectra and cluster counts. In particular, I will highlight the joint analysis of these two experiments’ datasets: delensing BK B-mode measurements using lensing template generated by SPT, Planck, and CIB measurements, and the future of delensing with BICEP Array and SPT-3G data. Lastly, I will give current instrument updates from both experiments: BICEP Array development and SPT-3G observations. |
Monday, April 15, 2019 11:30AM - 11:57AM |
Q12.00003: Current and near future Cosmic Microwave Background observations from Chile with the CLASS, POLARBEAR/Simons Array, ACT, and Simons Observatory experiments. Brian G Keating For more than a decade, cosmic microwave background (CMB) experiments have been elucidating properties of the early universe from the Parque Astronómico de Atacama in Northern Chile. Several recently commissioned observatories are poised to provide new information about the CMB's polarization, and others are in development for deployment to this unique high-altitude (5200 meter elevation) site. These instruments span a wide range of angular scales, instrument design approaches, and wavelength bands to reveal properties of the primordial and evolving universe while simultaneously mitigating sources of contamination, astrophysical and otherwise. All offer the opportunity to glimpse important aspects of fundamental physics. This talk will describe recent results, ongoing progress, and upcoming performance forecasts for the CLASS, POLARBEAR/Simons Array, ACT, and Simons Observatory experiments. |
Monday, April 15, 2019 11:57AM - 12:15PM |
Q12.00004: Next Decade Ground: The CMB-S4 Experiment Nils W Halverson CMB-S4 is a next-generation ground-based cosmic microwave background (CMB) experiment consisting of dedicated telescopes equipped with highly sensitive superconducting cameras operating at multiple sites. CMB-S4 will provide a dramatic leap forward in our understanding of the fundamental nature of space and time and the evolution of the Universe. The science goals of CMB-S4 include illuminating cosmic inflation, measuring the sum of neutrino masses, searching for relativistic relics in the early universe, characterizing dark energy and dark matter, and mapping the matter distribution in the universe. These goals require measurements with unprecedented sensitivity and control of systematic errors. To address this challenge, the CMB community has come together to advocate a single comprehensive “Stage-4” experiment, called CMB-S4, which has been endorsed by the 2014 report of the Particle Physics Project Prioritization Panel (P5) “Building for Discovery,” and the 2015 NAS/NRC report “A Strategic Vision for NSF Investments in Antarctic and Southern Ocean Research.”
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Monday, April 15, 2019 12:15PM - 12:33PM |
Q12.00005: CMB Space Missions in the Next Decade Hannes Hubmayr
I will motivate a next decade space mission and describe the status of the candidates. |
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