Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 471, Issue 2, Pages 1565-1580Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1659
Keywords
gravitational lensing: weak; dark matter; large-scale structure of Universe
Categories
Funding
- NSERC
- Swiss National Science Foundation (SNSF)
- European Commission under a Marie-Sklodwoska-Curie European Fellowship (EU project) [656869]
- STFC Advanced Fellowship at Liverpool JMU
- Canadian Institute for Advanced Research
- European Research Council under the EC FP7 grant [240185]
- Deutsche Forschungsgemeinschaft [TR33]
- European Research Council [647112]
- Emmy Noether grant of the Deutsche Forschungsgemeinschaft [HI 1495/2-1]
- Science and Technology Facilities Council [ST/L00061X/1, ST/F007159/1, ST/M000966/1, ST/N000919/1, ST/J001465/1, ST/H002456/1] Funding Source: researchfish
- STFC [ST/N000919/1, ST/F007159/1, ST/J001465/1, ST/H002456/1, ST/L00061X/1] Funding Source: UKRI
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We present measurements of the spatial mapping between (hot) baryons and the total matter in the Universe, via the cross-correlation between the thermal Sunyaev-Zeldovich (tSZ) map from Planck and the weak gravitational lensing maps from theRed Cluster Sequence Lensing Survey (RCSLenS). The cross-correlations are performed on the map level where all the sources (including diffuse intergalactic gas) contribute to the signal. We consider two configuration-space correlation function estimators,. xi(y-k) and xi(y-gamma t), and a Fourier-space estimator, C-l(y-k), in our analysis. We detect a significant correlation out to 3 degrees of angular separation on the sky. Based on statistical noise only, we can report 13 sigma and 17 sigma detections of the cross-correlation using the configuration-space y-k and y-gamma(t) estimators, respectively. Including a heuristic estimate of the sampling variance yields a detection significance of 7 sigma and 8 sigma, respectively. A similar level of detection is obtained from the Fourier-space estimator, C-l(y-k). As each estimator probes different dynamical ranges, their combination improves the significance of the detection. We compare our measurements with predictions from the cosmo-OverWhelmingly Large Simulations suite of cosmological hydrodynamical simulations, where different galactic feedback models are implemented. We find that a model with considerable active galactic nuclei (AGN) feedback that removes large quantities of hot gas from galaxy groups and Wilkinson Microwave Anisotropy Probe 7-yr best-fitting cosmological parameters provides the best match to the measurements. All baryonic models in the context of a Planck cosmology overpredict the observed signal. Similar cosmological conclusions are drawn when we employ a halo model with the observed 'universal' pressure profile.
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