- Aug. 24, 2020, 2:00 pm US/Central
- Anze Slosar, BNL
Abstract: Universe is full of neutral hydrogen shining in the 21-cm spin-flip transition. Using this line to trace cosmic structure allows us to map the large scale structure in three dimensions very fast and cost efficiently. Realizing the potential of this technique in pracice has proven to be devilishly difficult. Fortunately, the problems are purely technical in nature and regard characterization, calibration and stability of the instrument. I will talk about Packed Ultra-wideband Mapping Array (PUMA), a proposal for the next generation radio telescope dedicated primarily to intensity mapping. It will measure expansion history and cosmic growth measurements to redshift z=6, characterize inflation, measure millions of Fast Radio Bursts, monitor thousands of pulsars and perhaps even allow direct measurements of the real-time expansion of the universe. I will discuss the scientific, technological and programmatic issues that we need overcome to make it become real.
For more information, please contact Yu-Dai Tsai at ytsaiATfnal.gov.