Planck 2018 results. VIII. Gravitational lensing
South Pole Telescope
Sigma
Strong gravitational lensing
Gravitational lensing formalism
Cosmic variance
DOI:
10.48550/arxiv.1807.06210
Publication Date:
2018-01-01
AUTHORS (158)
ABSTRACT
We present measurements of the cosmic microwave background (CMB) lensing potential using final $\textit{Planck}$ 2018 temperature and polarization data. increase significance detection in maps from $5\,\sigma$ to $9\,\sigma$. Combined with temperature, is detected at $40\,\sigma$. an extensive set tests robustness lensing-potential power spectrum, construct a minimum-variance estimator likelihood over multipoles $8 \le L 400$. find good consistency between constraints results CMB spectra within $\rm{\Lambda CDM}$ model. baryon density other weak priors, analysis alone constrains $\sigma_8 \Omega_{\rm m}^{0.25}=0.589\pm 0.020$ ($1\,\sigma$ errors). Also combining acoustic oscillation (BAO) data, we tight individual parameter constraints, $\sigma_8=0.811\pm0.019$, $H_0=67.9_{-1.3}^{+1.2}\,\text{km}\,\text{s}^{-1}\,\rm{Mpc}^{-1}$, $\Omega_{\rm m}=0.303^{+0.016}_{-0.018}$. Combining spectrum measure $\sigma_8$ better than $1\,\%$ precision, finding $\sigma_8=0.811\pm 0.006$. Dark Energy Survey, give combined lensing-only that are tighter joint galaxy clustering. Using infrared (CIB) make estimate $60\,\%$ sky considerably more small-scale signal. demonstrate delensing spectra, detecting maximum removal $40\,\%$ lensing-induced all spectra. The improvement sharpening peaks by including both CIB quadratic reconstruction high (abridged).
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