期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 471, 期 2, 页码 1619-1633出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1675
关键词
gravitational lensing: weak; dark matter; large-scale structure of Universe
资金
- ESO Telescopes at the La Silla Paranal Observatory [177.A-3016, 177.A-3017, 177.A-3018]
- NOVA grant
- NWO-M grant
- Department of Physics & Astronomy of the University of Padova (Naples)
- Department of Physics of University Federico II (Naples)
- European Commission under a Marie-Sklodowska-Curie European Fellowship (EU project) [656869]
- NSERC of Canada
- CIFAR
- Emmy Noether grant of the Deutsche Forschungsgemeinschaft [Hi 1495/2-1]
- European Research Council under European Union's Seventh Framework Programme (FP7) grant [279396, 647112]
- Netherlands Organization for Scientific Research (NWO) [614.001.103]
- Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) [CE110001020]
- People Programme (Marie Curie Actions) under the FP7 REA grant [627288]
- Beecroft fellowship
- Deutsche Forschungsgemeinschaft [TR33]
- STFC grant [ST/N000919/1]
- Alexander von Humboldt Foundation
- Science and Technology Facilities Council [ST/N000919/1, ST/H002456/1] Funding Source: researchfish
- STFC [ST/N000919/1, 1659475, ST/H002456/1] Funding Source: UKRI
We present the tomographic cross-correlation between galaxy lensing measured in the Kilo Degree Survey (KiDS-450) with overlapping lensing measurements of the cosmic microwave background (CMB), as detected by Planck 2015. We compare our joint probe measurement to the theoretical expectation for a flat Lambda cold dark matter cosmology, assuming the best-fitting cosmological parameters from the KiDS-450 cosmic shear and Planck CMB analyses. We find that our results are consistent within 1 sigma with the KiDS-450 cosmology, with an amplitude re-scaling parameter A(KiDS) = 0.86 +/- 0.19. Adopting a Planck cosmology, we find our results are consistent within 2 sigma, with A(Planck) = 0.68 +/- 0.15. We show that the agreement is improved in both cases when the contamination to the signal by intrinsic galaxy alignments is accounted for, increasing A by similar to 0.1. This is the first tomographic analysis of the galaxy lensing -CMB lensing cross-correlation signal, and is based on five photometric redshift bins. We use this measurement as an independent validation of the multiplicative shear calibration and of the calibrated source redshift distribution at high redshifts. We find that constraints on these two quantities are strongly correlated when obtained from this technique, which should therefore not be considered as a stand-alone competitive calibration tool.
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