Measurements of the Temperature and E-mode Polarization of the Cosmic Microwave Background from the Full 500-square-degree SPTpol Dataset

Abstract

Using the full four-year SPTpol 500 deg${}^2$ dataset in both the 95 GHz 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 auto-power spectrum ($EE$) and temperature-$E$-mode cross-power spectrum ($TE$) in the angular multipole range $50<\ell <8000$. 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 $\hat{I}›CDM$ model, for which we find $H_0=70.48\pm 2.16$ km s${}^{-1}$ Mpc${}^{-1}$ and $\hat{I}{\text{c◯}}_m=0.271\pm 0.026$, when using only the SPTpol data and a Planck-based prior on the optical depth to reionization. The $\hat{I}›CDM$ parameter constraints are consistent across the 95 GHz-only, 150 GHz-only, $TE$-only, and $EE$-only data splits. Between the $\ell <1000$ and $\ell >1000$ data splits, the $\hat{I}›CDM$ parameter constraints are borderline consistent at the $\sim 2\ddot{I}ƒ$ level. This consistency improves when including a parameter $A_L$, the degree of lensing of the CMB inferred from the smearing of acoustic peaks. When marginalized over $A_L$, the $\hat{I}›CDM$ 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 $\ell >1700$ in $TE$ and $\ell >2000$ in $EE$.