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Dutcher, D.; Balkenhol, L.; Ade, P. A. R.; Anderes, E.; Anderson, A. J.; Archipley, M.; Avva, J. S.; Aylor, K.; Barry, P. S.; Basu Thakur, R.; Bender, A. N.; Benson, B. A.; Bianchini, F.; Bleem, L. E.; Bouchet, F. R.; Bryant, L.; Carlstrom, J. E.; Carter, F. W.; Cecil, T. W.; Chang, C. L.; Chaubal, P.; Chen, G.; Cho, H.-M.; Chou, T.-L.; Cliche, J.-F.; Cukierman, A.; de Haan, T.; Dibert, K.; Ding, J.; Dobbs, M. A.; Everett, W.; Feng, C.; Ferguson, K. R.; Foster, A.; Fu, J.; Galli, S.; Gambrel, A. E.; Goeckner-Wald, N.; Guns, S.; Gupta, N.; Guyser, R.; Halverson, N. W.; Harke-Hosemann, A. H.; Harrington, N. L.; Henning, J. W.; Hilton, G. C.; Hivon, E.; Holder, G. P.; Hood, J. C.; Irwin, K. D.; Jeong, O. B.; Jonas, M.; Jones, A.; Khaire, T. S.; Knox, L.; Kofman, A. M.; Korman, M.; Kubik, D. L.; Kuhlmann, S.; Lee, A. T.; Lowitz, A. E.; Lu, C.; Michalik, D.; Millea, M.; Montgomery, J.; Natoli, T.; Nguyen, H.; Noble, G. I.; Novosad, V.; Omori, Y.; Padin, S.; Pan, Z.; Paschos, P.; Pearson, J.; Posada, C. M.; Prabhu, K.; Quan, W.; Rahlin, A.; Reichardt, C. L.; Riebel, D.; Riedel, B.; Rouble, M.; Shirokoff, E.; Smecher, G.; Sobrin, J. A.; Stark, A. A.; Stephen, J.; Story, K. T.; Thorne, B.; Tucker, C.; Umilta, C.; Vale, L. R.; Vanderlinde, K.; Vieira, J. D.; Wang, G.; Whitehorn, N.; Wu, W. L. K.; Yefremenko, V.; Yoon, K. W.; Young, M. R.
Physical review. D, 07/2021, Letnik: 104, Številka: 2Journal Article
In this work, 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 deg2 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 H0=68.8±1.5 km s-1 Mpc-1 and σ8=0.789±0.016, with a gravitational lensing amplitude consistent with the ΛCDM prediction (AL=0.98±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.
