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Planck 2018 results. VIII. Gravitational lensing
journal contribution
posted on 2023-06-09, 18:47 authored by N Aghanim, Y Akrami, M Ashdown, J Aumont, C Baccigalupi, M Ballardini, A J Banday, R B Barreiro, N Bartolo, S Basak, K Benabed, J P Bernard, M Bersanelli, Julien Carron, Antony LewisAntony Lewis, The Planck Collaboration, othersWe present measurements of the cosmic microwave background (CMB) lensing potential using the final Planck 2018 temperature and polarization data. We increase the significance of the detection of lensing in the polarization maps from 5s to 9s. Combined with temperature, lensing is detected at 40s4. We present an extensive set of tests of the robustness of the lensing-potential power spectrum, and construct a minimum-variance estimator likelihood over lensing multipoles 8=L=400. We find good consistency between lensing constraints and the results from the Planck CMB power spectra within the ?CDM?CDM model. Combined with baryon density and other weak priors, the lensing analysis alone constrains s8O0.25m=0.589±0.020 (1s errors). Also combining with baryon acoustic oscillation (BAO) data, we find tight individual parameter constraints, s8=0.811±0.019, H0=67.9+1.2-1.3kms-1Mpc-1, and Om=0.303+0.016-0.018. Combining with Planck CMB power spectrum data, we measure s8 to better than 1% precision, finding s8=0.811±0.006. We find consistency with the lensing results from the Dark Energy Survey, and give combined lensing-only parameter constraints that are tighter than joint results using galaxy clustering. Using Planck cosmic infrared background (CIB) maps we make a combined estimate of the lensing potential over 60% of the sky with considerably more small-scale signal. We demonstrate delensing of the Planck power spectra, detecting a maximum removal of 40% of the lensing-induced power in all spectra. The improvement in the sharpening of the acoustic peaks by including both CIB and the quadratic lensing reconstruction is detected at high significance (abridged).
History
Publication status
- Published
File Version
- Accepted version
Journal
Astronomy and AstrophysicsISSN
0004-6361Publisher
EDP SciencesExternal DOI
Volume
641Page range
1-44Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-09-10First Open Access (FOA) Date
2019-09-10First Compliant Deposit (FCD) Date
2019-08-28Usage metrics
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