Planck 2015 results. XV. Gravitational lensing
By P. Ade, N. Aghanim, M. Arnaud, M. Ashdown, J. Aumont, C. Baccigalupi, A. Banday, Rita Belén Barreiro, J. Bartlett, N. Bartolo and 219 more. 2015
416 citations recorded by the source corpus.
We present the most significant measurement of the cosmic microwave background (CMB) lensing potential to date (at a level of 40 sigma), using temperature and polarization data from the Planck 2015 full-mission release. Using a polarization-only estimator we detect lensing at a significance of 5 sigma. We cross-check the accuracy of our measurement using the wide frequency coverage and complementarity of the temperature and polarization measurements. Public products based on this measurement include an estimate of the lensing potential over approximately 70% of the sky, an estimate of the lensing potential power spectrum in bandpowers for the multipole range 40<L<400 and an associated likelihood for cosmological parameter constraints. We find good agreement between our measurement of the lensing potential power spectrum and that found in the best-fitting LCDM model based on the Planck temperature and polarization power spectra. Using the lensing likelihood alone we obtain a percent-level measurement of the parameter combination $\sigma_8 \Omega_m^{0.25} = 0.591\pm 0.021$. We combine our determination of the lensing potential with the E-mode polarization also measured by Planck to generate an estimate of the lensing B-mode. We show that this lensing B-mode estimate is correlated with the B-modes observed directly by Planck at the expected level and with a statistical significance of 10 sigma, confirming Planck's sensitivity to this known sky signal. We also correlate our lensing potential estimate with the large-scale temperature anisotropies, detecting a cross-correlation at the 3 sigma level, as expected due to dark energy in the concordance LCDM model.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/1319778125e93625ed07ba491c32a4edfe58d9f8
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In Astronomy and Astrophysics
Citations in the corpus
- Implications of an extended dark energy cosmology with massive neutrinos for cosmological tensions (2018, methodology): “Indeed, the amount of lensing measured from the smoothing of high multipole peaks in the TT spectrum is higher than that measured from C l , the latter being compatible with the ΛCDM expectation [7, 36].”
- A volumetric deep Convolutional Neural Network for simulation of dark matter halo catalogues (2018, background): “Modern large-scale structure survey techniques like Sunaeyev-Zeldovich effect (Planck Collaboration et al. 2016; George et al. 2015), weak lensing (Ade et al. 2016; Joudaki et al. 2017; Hildebrandt et al. 2017; DES Collaboration et al. 2017), or intensity mapping (Kovetz et al. 2017), hold in- ?”