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

• Published in: Physical Review D
• Main Authors: Dutcher, D., Balkenhol, L., Ade, P. A. R., Ahmed, Z., Anderes, E., Anderson, A. J., Archipley, M., Avva, J. S., Aylor, K., Barry, P. S., Basu Thakur, R., Benabed, K., Bender, A. N., Benson, B. A., Bianchini, F., Bleem, L. E., Bouchet, F. R., Bryant, L., Byrum, K., 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., Crawford, T. M., Cukierman, A., Daley, C., de Haan, T., Denison, E. V., Dibert, K., Ding, J., Dobbs, M. A., Everett, W., Feng, C., Ferguson, K. R., Foster, A., Fu, J., Galli, S., Gambrel, A. E., Gardner, R. W., Goeckner-Wald, N., Gualtieri, R., Guns, S., Gupta, N., Guyser, R., Halverson, N. W.
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Physical Society 2021
• Subjects: South Pole; South pole
• Online Access: https://authors.library.caltech.edu/109973/; https://authors.library.caltech.edu/109973/1/PhysRevD.104.022003.pdf; https://authors.library.caltech.edu/109973/2/2101.01684.pdf; https://resolver.caltech.edu/CaltechAUTHORS:20210722-143105653

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 (A_L = 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.