An Improved Measurement of the Secondary Cosmic Microwave Background Anisotropies from the SPT-SZ + SPTpol Surveys

Reichardt, Christian; Patil, S.; Ade, Peter A. R.; Anderson, A. J.; Austermann, J. E.; Avva, J. S.; Baxter, Eric J.; Beall, James A.; Bender, A. N.; Benson, B. A.; Bianchini, F.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L.; Chaubal, P.; Chiang, H. C.; Chou, T-L.; Citron, R.; Moran, C. Corbett; Crawford, T. M.; Crites, A. T.; Haan, T. de; Dobbs, M.; Everett, W.; Gallicchio, Jason; George, E. M.; Gilbert, A.; Gupta, N.; Halverson, N. W.; Harrington, N. L.; Henning, J. W.; Hilton, G. C.; Holder, Gil; Holzapfel, W. L.; Hrubes, J. D.; Huang, N.; Hubmayr, Johannes; Irwin, K. D.; Knox, L.; Lee, A. T.; Li, D.; Lowitz, A.; Luong-Van, D.; McMahon, Jeff; Mehl, J.; Meyer, S. S.; Millea, M.; Mocanu, L. M.; Mohr, J. J.; Montgomery, J.; Nadolski, A.; Natoli, T.; Nibarger, J. P.; Noble, G. I.; Novosad, V.; Omori, Y.; Padin, S.; Pryke, C.; Ruhl, J. E.; Saliwanchik, B. R.; Sayre, J. T.; Schaffer, K. K.; Shirokoff, E.; Sievers, C.; Smecher, G.; Spieler, H.; Staniszewski, Z.; Stark, A. A.; Tucker, C.; Vanderlinde, K.; Veach, Todd; Vieira, J. D.; Wang, G.; Whitehorn, N.; Williamson, A. R.; Wu, W. L. K.; Yefremenko, V.

doi:10.3847/1538-4357/abd407

Cited by 81 publications

(81 citation statements)

References 60 publications

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“…For temperature, we also account for foreground contamination by subtracting from the SPT-3G band powers the best-fit foreground model from Ref. [3] with additional radio galaxy power from the different point source mask threshold calculated according to the model in Ref. [51].…”

Section: Full-field Calibrationmentioning

confidence: 99%

“…In the baseline case, we apply Gaussian priors to the six D ps;ν i ×ν j 3000 parameters based on the temperature values from Ref. [3], which we adjust for our flux cut following the model of Ref. [51] and scale by the polarization fractions reported by Ref.…”

Section: Parameter Fitting and Modelingmentioning

confidence: 99%

“…Satellite measurements of the CMB temperature power spectrum are now cosmic variance limited from the largest angular scales down to roughly seven arcminutes [1] (corresponding to angular multipoles l ≲ 1600), and ground-based observations extend these measurements to arcminute scales, at which point other sources of millimeter-wave anisotropy, including the cosmic infrared background, radio galaxies, and the thermal and kinetic Sunyaev-Zel'dovich (SZ) effects, begin to dominate over the primary CMB temperature signal. [2,3].…”

Section: Introductionmentioning

confidence: 99%

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Measurements of the E -mode polarization and temperature- E -mode correlation of the CMB from SPT-3G 2018 data

Dutcher¹,

Balkenhol²,

Ade³

et al. 2021

Phys. Rev. D

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188

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We present measurements of the E-mode (EE) polarization power spectrum and temperature-E-mode (TE) cross-power spectrum of the cosmic microwave background using data collected by SPT-3G, the latest instrument installed on the South Pole Telescope. This analysis uses observations of a 1500 deg 2 region at 95, 150, and 220 GHz taken over a four-month period in 2018. We report binned values of the EE and TE power spectra over the angular multipole range 300 ≤ l < 3000, using the multifrequency data to construct six semi-independent estimates of each power spectrum and their minimum-variance combination. These measurements improve upon the previous results of SPTpol across the multipole ranges 300 ≤ l ≤ 1400 for EE and 300 ≤ l ≤ 1700 for TE, resulting in constraints on cosmological parameters comparable to those from other current leading ground-based experiments. We find that the SPT-3G data set is well fit by a ΛCDM cosmological model with parameter constraints consistent with those from Planck and SPTpol data. From SPT-3G data alone, we find H 0 ¼ 68.8 AE 1.5 km s −1 Mpc −1 and σ 8 ¼ 0.789 AE 0.016, with a gravitational lensing amplitude consistent with the ΛCDM prediction (A L ¼ 0.98 AE 0.12). We combine the SPT-3G and the Planck data sets and obtain joint constraints on the ΛCDM model. The volume of the 68% confidence region in six-dimensional ΛCDM parameter space is reduced by a factor of 1.5 compared to Planck-only constraints, with no significant shifts in central values. We note that the results presented here are obtained from data collected during just half of a typical observing season with only part of the focal plane operable, and that the active detector count has since nearly doubled for observations made with SPT-3G after 2018.

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Section: Full-field Calibrationmentioning

confidence: 99%

Section: Parameter Fitting and Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Measurements of the E -mode polarization and temperature- E -mode correlation of the CMB from SPT-3G 2018 data

Dutcher¹,

Balkenhol²,

Ade³

et al. 2021

Phys. Rev. D

Self Cite

188

View full text Add to dashboard Cite

show abstract

“…Measurements of the cosmic microwave background (CMB) provide a unique opportunity to learn about the early universe and its evolution over cosmic time. A combination of satellite and ground-based observations have provided a sample-variance-limited view of CMB temperature anisotropy down to few-arcminute scales, beyond which foreground signals dominate [1][2][3][4]. The snapshot of conditions in the early universe provided by the CMB has been crucial in establishing the sixparameter ΛCDM model as the standard model of cosmology.…”

Section: Introductionmentioning

confidence: 99%

Constraints on ΛCDM extensions from the SPT-3G 2018 EE and TE power spectra

Balkenhol¹,

Dutcher²,

Ade³

et al. 2021

Phys. Rev. D

Self Cite

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We present constraints on extensions to the ΛCDM cosmological model from measurements of the E-mode polarization auto-power spectrum and the temperature-E-mode cross-power spectrum of the cosmic microwave background (CMB) made using 2018 SPT-3G data. The extensions considered vary the primordial helium abundance, the effective number of relativistic degrees of freedom, the sum of neutrino masses, the relativistic energy density and mass of a sterile neutrino, and the mean spatial curvature. We do not find clear evidence for any of these extensions, from either the SPT-3G 2018 dataset alone or in combination with baryon acoustic oscillation and Planck data. None of these model extensions significantly relax the tension between Hubble-constant, H0, constraints from the CMB and from distance-ladder measurements using Cepheids and supernovae. The addition of the SPT-3G 2018 data to Planck reduces the square-root of the determinants of the parameter covariance matrices by factors of 1.3 − 2.0 across these models, signaling a substantial reduction in the allowed parameter volume. We also explore CMB-based constraints on H0 from combined SPT, Planck , and ACT DR4 datasets. While individual experiments see some indications of different H0 values between the T T , TE, and EE spectra, the combined H0 constraints are consistent between the three spectra. For the full combined datasets, we report H0 = 67.49 ± 0.53 km s −1 Mpc −1 , which is the tightest constraint on H0 from CMB power spectra to date and in 4.1 σ tension with the most precise distance-ladder-based measurement of H0. The SPT-3G survey is planned to continue through at least 2023, with existing maps of combined 2019 and 2020 data already having ∼ 3.5× lower noise than the maps used in this analysis.

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“…It is consequently necessary to be able to model all the contributions (including the tSZ angular power spectrum) to perform cosmological analyses. Most current analyses of CMB observations at small scales are done following the same approach [see, e.g., [6][7][8][9]. A theoretical CMB power spectrum is added to templates of each non-CMB signal to reproduce the observed power spectrum.…”

Section: Introductionmentioning

confidence: 99%

CMB at small scales: Cosmology from tSZ power spectrum

et al. 2022

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Small scale CMB angular power spectrum contains not only primordial CMB information but also many contaminants coming from secondary anisotropies. Most of the latter depend on the cosmological model but are often marginalised over. We propose a new analysis of the SPT data focusing on the cosmological contribution of the thermal Sunyaev Zel’dovich (tSZ) effect. We model the tSZ angular spectrum with the halo model and train a random forest algorithm to speed up its computation. We show that using the cosmological information of the tSZ on top of the primordial CMB one contained in SPT data bring more constraints on cosmological parameters. We also combine for the first time Planck tSZ angular power spectrum with SPT ones to put further constraints. This proof of concept study shows how much a proper modelling of the foregrounds in the cosmological analyses is needed.

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An Improved Measurement of the Secondary Cosmic Microwave Background Anisotropies from the SPT-SZ + SPTpol Surveys

Cited by 81 publications

References 60 publications

Measurements of the E -mode polarization and temperature- E -mode correlation of the CMB from SPT-3G 2018 data

Measurements of the E -mode polarization and temperature- E -mode correlation of the CMB from SPT-3G 2018 data

Constraints on ΛCDM extensions from the SPT-3G 2018 EE and TE power spectra

CMB at small scales: Cosmology from tSZ power spectrum

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