The thermalisation of massive galaxy clusters

Abstract

In the hierarchical scenario of structure formation, galaxy clusters are the ultimate virialised products in mass and time. Hot baryons in the intracluster medium (ICM) and cold baryons in galaxies inhabit a dark matter dominated halo. Internal processes, accretion, and mergers can perturb the equilibrium, which is established only at later times. However, the cosmic time when thermalisation is effective is still to be assessed. Here we show that massive clusters in the observed universe attained an advanced thermal equilibrium $\sim 1.8\text{Gyr}$ ago, at redshift $z=0.14\pm 0.06$, when the universe was $11.7\pm 0.7\text{Gyr}$ old. Hot gas is mostly thermalised after the time when cosmic densities of matter and dark energy match. We find in a statistically nearly complete and homogeneous sample of 120 clusters from the {\it Planck} Early Sunyaev-Zel'dovich (ESZ) sample that the kinetic energy traced by the galaxy velocity dispersion is a faithful probe of the gravitational energy since a look back time of at least $\sim 5.4\text{Gyr}$, whereas the efficiency of hot gas in converting kinetic to thermal energy, as measured through X-ray observations in the core-excised area within $r_{500}$, steadily increases with time. The evolution is detected at the $\sim 98$ per cent probability level. Our results demonstrate that halo mass accretion history plays a larger role for cluster thermal equilibrium than radiative physics. The evolution of hot gas is strictly connected to the cosmic structure formation.

arXiv comment10 pages, 3 figures, in press on MNRAS

References in corpus (70)

• Statistical Properties of X-ray Clusters: Analytic and Numerical Comparisons
• Chandra sample of nearby relaxed galaxy clusters: mass, gas fraction, and mass-temperature relation
• Concentrations of Dark Halos from their Assembly Histories
• Tracing cosmic evolution with clusters of galaxies
• KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
• Chandra Cluster Cosmology Project II: Samples and X-ray Data Reduction
• Galaxy Clusters Discovered via the Sunyaev-Zel'dovich Effect in the 2500-square-degree SPT-SZ survey
• Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter
• The Merger Rates and Mass Assembly Histories of Dark Matter Haloes in the Two Millennium Simulations
• A New Robust Low-Scatter X-ray Mass Indicator for Clusters of Galaxies
• The Quiescent Intracluster Medium in the Core of the Perseus Cluster
• Planck 2015 results. XXIV. Cosmology from Sunyaev-Zeldovich cluster counts
• Planck Early Results VIII: The all-sky Early Sunyaev-Zeldovich cluster sample
• Virial Scaling of Massive Dark Matter Halos: Why Clusters Prefer a High Normalization Cosmology
• Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources
• Weighing the Giants IV: Cosmology and Neutrino Mass
• Scaling Properties of a Complete X-ray Selected Galaxy Group Sample
• The relation between velocity dispersion and mass in simulated clusters of galaxies: dependence on the tracer and the baryonic physics
• Robust Weak-lensing Mass Calibration of Planck Galaxy Clusters
• The Three Hundred project: a large catalogue of theoretically modelled galaxy clusters for cosmological and astrophysical applications
• The Mass Profile and Accretion History of Cold Dark Matter Halos
• Universal thermodynamic properties of the intracluster medium over two decades in radius in the X-COP sample
• Non-thermal pressure support in X-COP galaxy clusters
• XMM-Newton and Chandra Cross Calibration Using HIFLUGCS Galaxy Clusters: Systematic Temperature Differences and Cosmological Impact
• Subaru Weak Lensing Study of Seven Merging Clusters: Distributions of Mass and Baryons
• Massive Halos in Millennium Gas Simulations: Multivariate Scaling Relations
• The Remarkable Similarity of Massive Galaxy Clusters From z~0 to z~1.9
• Weighing the Giants V: Galaxy Cluster Scaling Relations
• The MUSIC of CLASH: predictions on the concentration-mass relation
• Toward Unbiased Galaxy Cluster Masses from Line of Sight Velocity Dispersions
• Scaling relations for galaxy clusters: properties and evolution
• Weighing Galaxy Clusters with Gas. II. On the Origin of Hydrostatic Mass Bias in LambdaCDM Galaxy Clusters
• The accretion history of dark matter halos I: The physical origin of the universal function
• X-Ray morphological analysis of the Planck ESZ clusters
• X-ray Properties of SPT Selected Galaxy Clusters at 0.2<z<1.5 Observed with XMM-Newton
• Cluster Mass Calibration at High Redshift: HST Weak Lensing Analysis of 13 Distant Galaxy Clusters from the South Pole Telescope Sunyaev-Zel'dovich Survey
• The cool core state of Planck SZ-selected clusters versus X-ray selected samples: evidence for cool core bias
• Scaling Relations and Overabundance of Massive Clusters at z>~1 from Weak-Lensing Studies with HST
• Observational constraints on the redshift evolution of X-ray scaling relations of galaxy clusters out to z ~ 1.5
• Cosmological hydrodynamical simulations of galaxy clusters: X-ray scaling relations and their evolution
• Measuring the dynamical state of Planck SZ-selected clusters: X-ray peak - BCG offset
• Formation times, mass growth histories and concentrations of dark matter haloes
• X-ray scaling relations for a representative sample of Planck selected clusters observed with XMM-Newton
• PSZ2LenS. Weak lensing analysis of the Planck clusters in the CFHTLenS and in the RCSLenS
• Comparing Masses in Literature (CoMaLit)-I. Bias and scatter in weak lensing and X-ray mass estimates of clusters
• CoMaLit III. Literature Catalogs of weak Lensing Clusters of galaxies (LC^2)
• Exploring the hydrostatic mass bias in MUSIC clusters: application to the NIKA2 mock sample
• The Dynamical State of Dark Matter Haloes in Cosmological Simulations I: Correlations with Mass Assembly History
• XMM-Newton Observations of Evolution of Cluster X-Ray Scaling Relations at z=0.4-0.7
• Universality of dark matter haloes shape over six decades in mass: Insights from the Millennium XXL and SBARBINE simulations
• HICOSMO - Cosmology with a complete sample of galaxy clusters: I. Data analysis, sample selection and luminosity-mass scaling-relation
• The scatter and evolution of the global hot gas properties of simulated galaxy cluster populations
• The Three Hundred Project: The evolution of galaxy cluster density profiles
• CLUMP-3D. Testing $\Lambda$CDM with galaxy cluster shapes
• CoMaLit-V. Mass forecasting with proxies. Method and application to weak lensing calibrated samples
• Detection of anti-correlation of hot and cold baryons in galaxy clusters
• Imprints of Mass Accretion History on the Shape of the Intracluster Medium and the $T_X-M$ Relation
• XXL Survey groups and clusters in the Hyper Suprime-Cam Survey. Scaling relations between X-ray properties and weak lensing mass
• CLUMP-3D. Three dimensional lensing and multi-probe analysis of MACS J1206.2-0847, a remarkably regular cluster
• Deriving the Hubble constant using Planck and XMM-Newton observations of galaxy clusters
• Evolution of the Thermodynamic Properties of Clusters of Galaxies out to Redshift of 1.8
• Constraints on the Mass, Concentration, and Nonthermal Pressure Support of Six CLASH Clusters from a Joint Analysis of X-ray, SZ, and Lensing Data
• Discovery of a new fundamental plane dictating galaxy cluster evolution from gravitational lensing
• The Lack of Non-Thermal Motions in Galaxy Cluster Cores
• Comparing different mass estimators for a large subsample of the {\it Planck}-ESZ clusters
• The XXL Survey: XXIII. The Mass Scale of XXL Clusters from Ensemble Spectroscopy
• Internal dark matter structure of the most massive galaxy clusters
• A New Interpretation of the Mass-Temperature Relation and Mass Calibration of Galaxy Clusters Based on the Fundamental Plane
• The XXL Survey: XXXVIII. Scatters and correlations of X-ray proxies in the bright XXL cluster sample
• Characterizing galaxy clusters by their gravitational potential: systematics of cluster potential reconstruction

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• \textsc{The Three Hundred} project: The \textsc{Gizmo-Simba} run
• A study of the hydrostatic mass bias dependence and evolution within The Three Hundred clusters
• The Three Hundred: Cluster Dynamical States and Relaxation Time Scale
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• The Evolution and Mass Dependence of Galaxy Cluster Pressure Profiles at 0.05 $\le z\le$ 0.60 and $4\times 10^{14}$ M${}_{\odot }$ $\le {\text{M}}_{500}\le 30\times 10^{14}$ M${}_{\odot }$
• Scaling relations of clusters and groups, and their evolution
• AMICO galaxy clusters in KiDS-1000: cosmological constraints and mass calibration from counts and weak lensing
• Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Resolving the Hot and Ionized Universe through the Sunyaev-Zeldovich effect
• The THREEHUNDRED project: the effect of baryon processes at galaxy cluster scale
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