Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 456, Issue 1, Pages L74-L78Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnrasl/slv175
Keywords
gravitational lensing: weak; galaxies: clusters: general; cosmology: observations
Categories
Funding
- Royal Society
- Science and Technology Facilities Council (STFC) [ST/F001166/1]
- World Premier International Research Center Initiative (WPI Initiative)
- Funds for the Development of Human Resources in Science and Technology under MEXT, Japan
- Core Research for Energetic Universe in Hiroshima University (the MEXT programme for promoting the enhancement of research universities, Japan)
- CONICYT Anillo project [ACT-1122]
- STFC [ST/H001417/1, PP/E003486/1, ST/N000633/1, ST/I004459/1, ST/J003077/1, PPA/G/S/2002/00652, ST/I004459/2, ST/K000845/1] Funding Source: UKRI
- Grants-in-Aid for Scientific Research [26400264, 26800097] Funding Source: KAKEN
- Science and Technology Facilities Council [ST/M000966/1, PPA/G/S/2002/00652, ST/K000845/1] Funding Source: researchfish
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We test the assumption of hydrostatic equilibrium in an X-ray luminosity selected sample of 50 galaxy clusters at 0.15 < z < 0.3 from the Local Cluster Substructure Survey (LoCuSS). Our weak-lensing measurements of M500 control systematic biases to sub-4 per cent, and our hydrostatic measurements of the same achieve excellent agreement between XMM-Newton and Chandra. The mean ratio of X-ray to lensing mass for these 50 clusters is beta(X) = 0.95 +/- 0.05, and for the 44 clusters also detected by Planck, the mean ratio of Planck mass estimate to LoCuSS lensing mass is beta(P) = 0.95 +/- 0.04. Based on a careful like-for-like analysis, we find that LoCuSS, the Canadian Cluster Comparison Project, and Weighing the Giants agree on beta(P) similar or equal to 0.9-0.95 at 0.15 < z < 0.3. This small level of hydrostatic bias disagrees at similar to 5 sigma with the level required to reconcile Planck cosmology results from the cosmic microwave background and galaxy cluster counts.
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