Measuring the hydrostatic mass bias in galaxy clusters by combining Sunyaev-Zel'dovich and CMB lensing data

Abstract

The cosmological parameters prefered by the cosmic microwave background (CMB) primary anisotropies predict many more galaxy clusters than those that have been detected via the thermal Sunyaev-Zeldovich (tSZ) effect. This tension has attracted considerable attention since it could be evidence of physics beyond the simplest $\Lambda$CDM model. However, an accurate and robust calibration of the mass-observable relation for clusters is necessary for the comparison, which has been proven difficult to obtain so far. Here, we present new contraints on the mass-pressure relation by combining tSZ and CMB lensing measurements about optically-selected clusters. Consequently, our galaxy cluster sample is independent from the data employed to derive cosmological constrains. We estimate an average hydrostatic mass bias of $b=0.26\pm 0.07$, with no significant mass nor redshift evolution. This value greatly reduces the tension between the predictions of $\Lambda$CDM and the observed abundance of tSZ clusters while being in agreement with recent estimations from tSZ clustering. On the other hand, our value for $b$ is higher than the predictions from hydro-dynamical simulations. This suggests the existence of mechanisms driving large departures from hydrostatic equilibrium and that are not included in state-of-the-art simulations, and/or unaccounted systematic errors such as biases in the cluster catalogue due to the optical selection.

4 pages, 3 figures

References in corpus (7)

• The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
• CLASH-X: A Comparison of Lensing and X-ray Techniques for Measuring the Mass Profiles of Galaxy Clusters
• Measuring cluster masses with CMB lensing: a statistical approach
• Reconciling Planck cluster counts and cosmology? Chandra/XMM instrumental calibration and hydrostatic mass bias
• High significance detection of the tSZ effect relativistic corrections
• Cosmological constraints from the observed angular cross-power spectrum between Sunyaev-Zel'dovich and X-ray surveys
• Predicting the CIB-$\varphi$ contamination in the cross-correlation of the tSZ effect and $\varphi$

Cited by in corpus (18)

• Emulation of baryonic effects on the matter power spectrum and constraints from galaxy cluster data
• Constraining baryonic feedback and cosmology with weak-lensing, X-ray, and kinematic Sunyaev-Zeldovich observations
• Constraining the Baryonic Feedback with Cosmic Shear Using the DES Year-3 Small-Scale Measurements
• Pressure profiles and mass estimates using high-resolution Sunyaev-Zel'dovich effect observations of Zwicky 3146 with MUSTANG-2
• X-ray Emission From Hot Gas in Galaxy Groups and Clusters in Simba
• The redshift evolution of X-ray and Sunyaev-Zel'dovich scaling relations in the FABLE simulations
• Scatter in Sunyaev--Zel'dovich effect scaling relations explained by inter-cluster variance in mass accretion histories
• Searching for Signatures of Dark matter-Dark Radiation Interaction in Observations of Large-scale Structure
• Deep learning for Sunyaev-Zel'dovich detection in Planck
• An Inpainting Approach to Tackle the Kinematic and Thermal SZ Induced Biases in CMB-Cluster Lensing Estimators
• Inferences from surface brightness fluctuations of Zwicky 3146 via the Sunyaev-Zeldovich effect and X-ray observations
• Simulating the LOcal Web (SLOW) II: Properties of local galaxy clusters
• Cross Correlation between the Thermal Sunyaev-Zel'dovich Effect and Projected Galaxy Density Field
• An exploration of the properties of cluster profiles for the thermal and kinetic Sunyaev-Zel'dovich effects
• Baryonification extended to thermal Sunyaev Zeldovich
• Caustic and hydrostatic mass bias: Implications for modified gravity
• Revisiting the Constancy of the Speed of Light: Galaxy Cluster Mass Bias Implications
• SuperModel Predictions in the Outskirts of the Galaxy Cluster Zwicky 3146