期刊
ASTROPHYSICAL JOURNAL
卷 926, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac1596
关键词
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资金
- Department of Energy's Office of Science [CD-0]
- National Science Foundation through the Mid-Scale Research Infrastructure-R1 award [OPP-1935892]
- Argonne National Laboratory, a U.S. Department of Energy (DOE) Office of Science User Facility [DE-AC02-06CH11357]
- Fermi Research Alliance, LLC (FRA) [DE-AC02-07CH11359]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- National Science Foundation [1248097, 1255358, 1815887, 1835865, 1852617, 2009469]
- Department of Energy [DE-SC0009919, DE-SC0009946, DE-SC0010129, DE-SC0011784]
- National Aeronautics and Space Administration [ATP-80NSSC20K0518]
- Australian Research Council Future Fellowship [FT150100074]
- NSERC
- CIFAR
- Sloan Foundation
- Dunlap family
- ASI COSMOS program
- ASI INDARK program
- NWO VIDI award [639.042.730]
- SNSF Eccellenza Professorial Fellowship [186879]
- European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC grant [616170]
- STFC [ST/P000525/1]
- research program Innovational Research Incentives Scheme (Vernieuwingsimpuls) - Netherlands Organization for Scientific Research through the NWO VIDI grant [639.042.612-Nissanke]
- Labex ILP part of the Idex SUPER [ANR-10-LABX-63, ANR-11-IDEX-0004-02]
- FAS Science Division Research Computing Group at Harvard University
- Direct For Computer & Info Scie & Enginr
- Office of Advanced Cyberinfrastructure (OAC) [1835865] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1815887, 2009469] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1255358] Funding Source: National Science Foundation
CMB-S4 is the next-generation ground-based cosmic microwave background (CMB) experiment, designed to improve the sensitivity of CMB measurements and enhance our understanding of the origin and evolution of the universe. This study presents a forecasting framework that uses a power-spectrum-based semianalytic projection tool to optimize constraints on the tensor-to-scalar ratio. The framework is unique in its use of information from current CMB experiments to predict the effectiveness of future CMB-polarization endeavors. The study also includes map-based validation studies, allowing for additional complexity and independent verification of the forecasts.
CMB-S4-the next-generation ground-based cosmic microwave background (CMB) experiment-is set to significantly advance the sensitivity of CMB measurements and enhance our understanding of the origin and evolution of the universe. Among the science cases pursued with CMB-S4, the quest for detecting primordial gravitational waves is a central driver of the experimental design. This work details the development of a forecasting framework that includes a power-spectrum-based semianalytic projection tool, targeted explicitly toward optimizing constraints on the tensor-to-scalar ratio, r, in the presence of Galactic foregrounds and gravitational lensing of the CMB. This framework is unique in its direct use of information from the achieved performance of current Stage 2-3 CMB experiments to robustly forecast the science reach of upcoming CMB-polarization endeavors. The methodology allows for rapid iteration over experimental configurations and offers a flexible way to optimize the design of future experiments, given a desired scientific goal. To form a closed-loop process, we couple this semianalytic tool with map-based validation studies, which allow for the injection of additional complexity and verification of our forecasts with several independent analysis methods. We document multiple rounds of forecasts for CMB-S4 using this process and the resulting establishment of the current reference design of the primordial gravitational-wave component of the Stage-4 experiment, optimized to achieve our science goals of detecting primordial gravitational waves for r > 0.003 at greater than 5 sigma, or in the absence of a detection, of reaching an upper limit of r < 0.001 at 95% CL.
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