CMB-S4: Forecasting Constraints on Primordial Gravitational Waves

Abstract 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…

• NS
  National Science Foundation

  Awards: 1255358, 1935892, 1835865, 2009469, 1248097, 1815887, DE-AC02-07CH11359, OPP-1935892, DE-AC02-05CH11231, DE-AC02-06CH11357, 1852617
• UD
  U.S. Department of Energy

  Awards: -AC02-05CH11231, Contract No. DE-AC02-07CH11359, DE-SC0010129, 76SF00515, DE-AC02-07CH11359, Contract No. DE-AC02-05CH11231, AC02-06CH11357, DE-SC0009946, SC0009946, 05CH11231, DE-SC0011784, Contract No. DE-AC02-06CH11357, No. DE-AC02-05CH11231, AC02-07CH11359, AC02-05CH11231, DE-AC02, No. DE-AC02-07CH11359, -SC0009919, 06CH11357, Contract No. DE-AC02-76SF00515, DE-AC02-05CH11231, No. DE-AC02-06CH11357, AC02-76SF00515, No. DE-AC02-76SF00515, DE-AC02-06CH11357, DE-SC0009919, DE-AC02-
• NA
  National Aeronautics and Space Administration

  Awards: DE-AC02-05CH11231, 80NSSC20K0518, DE-AC02-06CH11357
• AP
  Alfred P. Sloan Foundation

  Award: DE-AC02-05CH11231
• HU
  Harvard University
• CI
  Canadian Institute for Advanced Research
• NE
  National Energy Research Scientific Computing Center

  Awards: 05CH11231, AC02-05CH11231, Contract No. DE-AC02-05CH11231
• EC
  European Commission

  Awards: DE-AC02-05CH11231, 2007-2013, DE-AC02-06CH11357, 616170, DE-AC02-76SF00515
• AN
  Agence Nationale de la Recherche

  Awards: ANR-11-IDEX-0004-02, DE-AC02-76SF00515, ANR-10-LABX-63, ANR-11-IDEX, -11-IDEX-0004-02, DE-AC02-05CH11231, IDEX-0004-02, 11-IDEX-0004, 11-IDEX-0004-02, ANR-11-IDEX-0004, ANR-10, 10-LABX-63
• SN
  Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

  Award: 186879
• NO
  Nederlandse Organisatie voor Wetenschappelijk Onderzoek

  Awards: 639.042.730, 639.042.612, 639.042.612-Nissanke
• NS
  Nuclear Safety and Security Commission
• OO
  Office of Science

  Awards: AC02-76SF00515, DE-AC02-06CH11357, Contract No. DE-AC02-06CH11357, DE-AC02-76SF00515, AC02-05CH11231, -AC02-05CH11231, DE-AC02, No. DE-AC02-06CH11357, DE-AC02-07CH11359, 06CH11357, No. DE-AC02-05CH11231, Contract No. DE-AC02-05CH11231, AC02-06CH11357, 76SF00515
• NS
  Natural Sciences and Engineering Research Council of Canada

  Awards: DE-AC02-06CH11357, DE-AC02-07CH11359, DE-AC02-05CH11231
• SA
  Science and Technology Facilities Council

  Awards: ST/P000525/1, DE-AC02-07CH11359, ST/P004474/2, ST/P000525/1, ST/T000473/1, ST/X006344/1, ST/W002914/1, /P000525/1, ST/T000414/1, ST/S000623/1, DE-AC02-76SF00515
• BE
  Basic Energy Sciences

  Awards: DE-AC02, AC02-05CH11231, DE-AC02-76SF00515, DE-AC02-07CH11359, Contract No. DE-AC02-05CH11231, DE-AC02-05CH11231, Contract No. DE-AC02-06CH11357, AC02-06CH11357, 76SF00515, Contract No. DE-AC02-76SF00515, No. DE-AC02-05CH11231, AC02-76SF00515, 06CH11357, -AC02-05CH11231
• AN
  Argonne National Laboratory

  Awards: DE-AC02, DE-AC02-05CH11231, No. DE-AC02-06CH11357, 06CH11357, AC02-06CH11357, DE-AC02-76SF00515, Contract No. DE-AC02-06CH11357
• F
  Fermilab

  Award: Contract No. DE-AC02-07CH11359
• LB
  Lawrence Berkeley National Laboratory

  Awards: DE-AC02-05CH11231, DE-AC02-07CH11359, No. DE-AC02-05CH11231, DE-AC02-76SF00515, DE-AC02-06CH11357, Contract No. DE-AC02-05CH11231, 05CH11231, AC02-05CH11231
• SN
  SLAC National Accelerator Laboratory

  Awards: DE-AC02-06CH11357, Contract No. DE-AC02-76SF00515, AC02-76SF00515, DE-AC02-76SF00515, DE-AC02-05CH11231