Measurements of the temperature and E-mode polarization of the cosmic microwave background from the full 500-square-degree SPTpol dataset
Creators
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Chou, T.-L.1
- Ade, P. A. R.2
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Anderson, A. J.3
- Austermann, J. E.4, 5
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Balkenhol, L.6, 7
- Beall, J. A.4
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Bender, A. N.1
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Benson, B. A.1
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Bianchini, F.8
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Bleem, L. E.1
- Carlstrom, J. E.1
- Chang, C. L.1
- Chaubal, P.9
- Chiang, H. C.10, 11
- Citron, R.1
- Corbett Moran, C.12
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Crawford, T. M.1
- Crites, A. T.1
- de Haan, T.13, 14, 15
- Dobbs, M. A.10, 16
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Dutcher, D.17
- Everett, W.5
- Gallicchio, J.1
- George, E. M.18, 13
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Gupta, N.19
- Halverson, N. W.5
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Holder, G. P.20
- Holzapfel, W. L.13
- Hrubes, J. D.1
- Huang, N.13
- Hubmayr, J.4
- Irwin, K. D.8, 21
- Knox, L.22
- Lee, A. T.13, 14
- Li, D.4, 8
- Lowitz, A.1
- McMahon, J. J.1
- Montgomery, J.10
- Natoli, T.1
- Nibarger, J. P.4
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Noble, G. I.23
- Novosad, V.24
- Omori, Y.1
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Padin, S.1, 25
- Patil, S.9
- Pryke, C.26
- Quan, W.1
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Reichardt, C. L.9
- Ruhl, J. E.27
- Saliwanchik, B. R.27, 28
- Schaffer, K. K.1
- Sievers, C.1
- Smecher, G.10
- Stark, A. A.29
- Tucker, C.2
- Veach, T.30
- Vieira, J. D.20
- Wang, G.24
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Whitehorn, N.31
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Wu, W. L. K.1
- Yefremenko, V.24
- Zebrowski, J. A.1
- SPTpol Collaboration
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1.
University of Chicago
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2.
Cardiff University
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3.
Fermilab
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4.
National Institute of Standards and Technology
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5.
University of Colorado Boulder
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Institut d'Astrophysique de Paris
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Sorbonne University
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SLAC National Accelerator Laboratory
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University of Melbourne
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10.
McGill University
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11.
University of KwaZulu-Natal
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12.
Jet Propulsion Lab
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13.
University of California, Berkeley
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14.
Lawrence Berkeley National Laboratory
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High Energy Accelerator Research Organization
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16.
Canadian Institute for Advanced Research
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17.
Princeton University
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European Southern Observatory
- 19. CSIRO Space & Astronomy, P.O. Box 1130, Bentley, Western Australia 6102, Australia
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20.
University of Illinois Urbana-Champaign
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21.
Stanford University
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22.
University of California, Davis
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23.
University of Toronto
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24.
Argonne National Laboratory
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25.
California Institute of Technology
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26.
University of Minnesota
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27.
Case Western Reserve University
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28.
Yale University
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29.
Harvard-Smithsonian Center for Astrophysics
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30.
Southwest Research Institute
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31.
Michigan State University
Abstract
Using the full four-year SPTpol 500 deg2 dataset in both the 95 and 150 GHz frequency bands, we present measurements of the temperature and 𝐸-mode polarization of the cosmic microwave background (CMB), as well as the 𝐸-mode polarization autopower spectrum (𝐸𝐸) and temperature-𝐸-mode cross-power spectrum (𝑇𝐸) in the angular multipole range 50 <ℓ <8000. We find the SPTpol dataset to be self-consistent, passing several internal consistency tests based on maps, frequency bands, bandpowers, and cosmological parameters. The full SPTpol dataset is well-fit by the ΛCDM model, for which we find 𝐻0=70.48±2.16 km s−1 Mpc−1 and Ω𝑚 =0.271 ±0.026, when using only the SPTpol data and a Planck-based prior on the optical depth to reionization. The ΛCDM parameter constraints are consistent across the 95 GHz-only, 150 GHz-only, 𝑇𝐸-only, and 𝐸𝐸-only data splits. Between the ℓ <1000 and ℓ >1000 data splits, the ΛCDM parameter constraints are borderline consistent at the ∼2𝜎 level. This consistency improves when including a parameter 𝐴𝐿, the degree of lensing of the CMB inferred from the smearing of acoustic peaks. When marginalized over 𝐴𝐿, the ΛCDM parameter constraints from SPTpol are consistent with those from Planck. The power spectra presented here are the most sensitive measurements of the lensed CMB damping tail to date for roughly ℓ >1700 in 𝑇𝐸 and ℓ >2000 in 𝐸𝐸.
Copyright and License
© 2025 American Physical Society.
Acknowledgement
The South Pole Telescope program is supported by the National Science Foundation (NSF) through Awards No. OPP-1852617 and No. OPP-2332483. Partial support is also provided by the Kavli Institute of Cosmological Physics at the University of Chicago. Argonne National Laboratory’s work was supported by the U.S. Department of Energy, Office of High Energy Physics, under Contract No. DE-AC02-06CH11357. We gratefully acknowledge the computing resources provided on Crossover, a high-performance computing cluster operated by the Laboratory Computing Resource Center at Argonne National Laboratory. Work at Fermi National Accelerator Laboratory, a DOE-OS, HEP User Facility managed by the Fermi Research Alliance, LLC, was supported under Contract No. DE-AC02-07CH11359. Melbourne authors acknowledge support from the Australian Research Council’s Discovery Projects scheme (DP210102386).
Data Availability
The data that support the findings of this article are openly available, embargo periods may apply: https://pole.uchicago.edu/public/data/chou25/.
Files
PhysRevD.111.123513.pdf
Additional details
Funding
- National Science Foundation
- OPP-1852617
- National Science Foundation
- OPP-2332483
- University of Chicago
- United States Department of Energy
- DE-AC02-07CH11359
- Office of High Energy Physics
- DE-AC02-06CH11357
- Australian Research Council
- DP210102386
- Kavli Institute of Cosmological Physics
Dates
- Available
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2025-06-10Published online
Caltech Custom Metadata
- Caltech groups
- Division of Physics, Mathematics and Astronomy (PMA) , Physics Department
- Publication Status
- Published