• Hoekstra, Henk
• Mahdavi, Andisheh

Abstract

We present an updated, recalibrated, multiwavelength, X-ray + weak lensing measurement of the mass profiles for 50 rich systems of galaxies. We find that our weak gravitational lensing masses, calibrated with state-of-the-art shear testing simulations, are 18% +/- 4% higher than those found for the clusters in the Planck satellite sample. Using the Joint Analysis of Cluster Observations codebase, we simultaneously model the baryonic and nonbaryonic matter profiles in these systems, deriving joint constraints on the gas entropy, pressure, metallicity, and dark matter distributions. Simultaneous analysis of Chandra and XMM-Newton data where both are available allows us to constrain these profiles over nearly two decades in radius. We find clusters with low BCG-to-X-ray center offsets form a remarkably regular sample, with NFW dark matter profiles and gas fraction values that are consistent with the cosmological value. Clusters with low central gas entropy exhibit a similar trend, and do so with an intrinsic scatter that is consistent with zero. Non-relaxed clusters, on the other hand---those with offset BCGs and high central entropies---exhibit significant scatter and have mass profiles inconsistent with the NFW value (most likely due to strong violations of spherical symmetry). <P />...

Topics

• impedance spectroscopy
• cluster
• simulation