Imprints of Mass Accretion History on the Shape of the Intracluster Medium and the $T_X-M$ Relation

Abstract

We use a statistical sample of galaxy clusters from a large cosmological $N$-body$+$hydrodynamics simulation to examine the relation between morphology, or shape, of the X-ray emitting intracluster medium (ICM) and the mass accretion history of the galaxy clusters. We find that the mass accretion rate (MAR) of a cluster is correlated with the ellipticity of the ICM. The correlation is largely driven by material accreted in the last $\sim 4.5$~Gyr, indicating a characteristic time-scale for relaxation of cluster gas. Furthermore, we find that the ellipticity of the outer regions ($R\sim R_{500c}$) of the ICM is correlated with the overall MAR of clusters, while ellipticity of the inner regions ($\lesssim 0.5R_{500c}$) is sensitive to recent major mergers with mass ratios of $\ge 1:3$. Finally, we examine the impact of variations in cluster mass accretion history on the X-ray observable-mass scaling relations. We show that there is a {\it continuous\/} anti-correlation between the residuals in the $T_x-M$ relation and cluster MARs, within which merging and relaxed clusters occupy extremes of the distribution rather than form two peaks in a bi-modal distribution, as was often assumed previously. Our results indicate the systematic uncertainties in the X-ray observable-mass relations can be mitigated by using the information encoded in the apparent ICM ellipticity.

arXiv comment10 pages, 7 figures, comments welcome

References in corpus (60)

• The NumPy array: a structure for efficient numerical computation
• Where are the missing galactic satellites?
• How Do Galaxies Get Their Gas?
• How Filaments are Woven into the Cosmic Web
• Formation of Galaxy Clusters
• Chandra Cluster Cosmology Project II: Samples and X-ray Data Reduction
• Effects of Galaxy Formation on Thermodynamics of the Intracluster Medium
• Testing X-ray Measurements of Galaxy Clusters with Cosmological Simulations
• A New Robust Low-Scatter X-ray Mass Indicator for Clusters of Galaxies
• Comparing the temperatures of galaxy clusters from hydro-N-body simulations to Chandra and XMM-Newton observations
• Comparing the temperatures of galaxy clusters from hydro-N-body simulations to Chandra and XMM-Newton observations
• Rotation-Dependent Catastrophic Disruption of Gravitational Aggregates
• Residual Gas Motions in the Intracluster Medium and Bias in Hydrostatic Measurements of Mass Profiles of Clusters
• Dependence of the outer density profiles of halos on their mass accretion rate
• Effects of Baryons and Dissipation on the Matter Power Spectrum
• The splashback radius as a physical halo boundary and the growth of halo mass
• Systematics in the X-ray Cluster Mass Estimators
• The galaxy cluster mass scale and its impact on cosmological constraints from the cluster population
• The Observed Growth of Massive Galaxy Clusters II: X-ray Scaling Relations
• Markov Chain Monte Carlo Methods for Bayesian Data Analysis in Astronomy
• On the Cluster Physics of Sunyaev-Zel'dovich Surveys I: The Influence of Feedback, Non-thermal Pressure and Cluster Shapes on Y-M Scaling Relations
• On the nature of hydrostatic equilibrium in galaxy clusters
• Searching for Cool Core Clusters at High redshift
• Splashback in accreting dark matter halos
• Measuring the Three-Dimensional Structure of Galaxy Clusters. I. Application to a Sample of 25 Clusters
• Shapes and Alignments of Galaxy Cluster Halos
• Four Measures of the Intracluster Medium Temperature and Their Relation to a Cluster's Dynamical State
• Hydrodynamic Simulation of Non-thermal Pressure Profiles of Galaxy Clusters
• Quantifying the Morphologies and Dynamical Evolution of Galaxy Clusters. I. The Method
• On the role of AGN feedback on the thermal and chemodynamical properties of the hot intra-cluster medium
• Predicting Single-Temperature Fit to Multi-Component Thermal Plasma Spectra
• Weighing Galaxy Clusters with Gas. II. On the Origin of Hydrostatic Mass Bias in LambdaCDM Galaxy Clusters
• X-Ray morphological analysis of the Planck ESZ clusters
• The Physics of Galaxy Cluster Outskirts
• On determining the shape of matter distributions
• Properties of cluster satellites in hydrodynamical simulations
• Quantifying properties of ICM inhomogeneities
• Cosmology and Astrophysics from Relaxed Galaxy Clusters I: Sample Selection
• Evolution of the Merger Induced Hydrostatic Mass Bias in Galaxy Clusters
• Mass Accretion and its Effects on the Self-Similarity of Gas Profiles in the Outskirts of Galaxy Clusters
• X-ray mass proxies from hydrodynamic simulations of galaxy clusters (paper I)
• Splashback Shells of Cold Dark Matter Halos
• The outer profile of dark matter halos: an analytical approach
• A Model for Multi-property Galaxy Cluster Statistics
• The Morphologies and Alignments of Gas, Mass, and the Central Galaxies of CLASH Clusters of Galaxies
• A Morphology--Cosmology Connection for X--Ray Clusters
• Shapes of Gas, Gravitational Potential and Dark Matter in Lambda-CDM Clusters
• Cluster morphologies and model-independent Y_SZ estimates from Bolocam Sunyaev-Zel'dovich images
• Robust Quantification of Galaxy Cluster Morphology Using Asymmetry and Central Concentration
• Testing for X-ray-SZ Differences and Redshift Evolution in the X-ray Morphology of Galaxy Clusters
• The Role of Penetrating Gas Streams in Setting the Dynamical State of Galaxy Clusters
• Substructure and Scatter in the Mass-Temperature Relations of Simulated Clusters
• Locations of Accretion Shocks around Galaxy Clusters and the ICM properties: insights from Self-Similar Spherical Collapse with arbitrary mass accretion rates
• Morphological estimators on Sunyaev--Zel'dovich maps of MUSIC clusters of galaxies
• Galaxy cluster mergers
• The Influence of Concentration and Dynamical State on Scatter in the Galaxy Cluster Mass-Temperature Relation
• eROSITA cluster cosmology forecasts: cluster temperature substructure bias
• Stirred, not Clumped: Evolution of Temperature Profiles in the Outskirts of Galaxy Clusters
• A Baryonic Effect on the Merger Timescale of Galaxy Clusters
• Evaluating Tests of Virialization and Substructure Using Galaxy Clusters in the ORELSE Survey

Cited by in corpus (31)

• The Three Hundred Project: Dynamical state of galaxy clusters and morphology from multi-wavelength synthetic maps
• The Three Hundred Project: correcting for the hydrostatic-equilibrium mass bias in X-ray and SZ surveys
• Correlations between Triaxial Shapes and Formation History of Dark Matter Haloes
• The Three Hundred Project: quest of clusters of galaxies morphology and dynamical state through Zernike Polynomials
• Gas distribution from clusters to filaments in IllustrisTNG
• On the accretion history of galaxy clusters: temporal and spatial distribution
• SHAPing the Gas: Understanding Gas Shapes in Dark Matter Haloes with Interpretable Machine Learning
• Baryon Pasting Algorithm: Halo-based and Particle-based Pasting Methods
• The Three Hundred project: galaxy cluster mergers and their impact on the stellar component of brightest cluster galaxies
• Indirect Measurements of Gas Velocities in Galaxy Clusters: Effects of Ellipticity and Cluster Dynamic State
• Troubled cosmic flows: turbulence, enstrophy and helicity from the assembly history of the intracluster medium
• Scatter in Sunyaev--Zel'dovich effect scaling relations explained by inter-cluster variance in mass accretion histories
• The thermalisation of massive galaxy clusters
• Brightest Cluster Galaxies Trace Weak Lensing Mass Bias and Halo Triaxiality in The Three Hundred Project
• On the choice of the most suitable indicator for the assembly state of dark matter haloes through cosmic time
• Reconsidering the dynamical states of galaxy clusters using PCA and UMAP
• Low X-ray surface brightness clusters: Implications on the scatter of the $M-T$ and $L-T$ relations
• nIFTy Galaxy Cluster simulations VI: The dynamical imprint of substructure on gaseous cluster outskirts
• Emulating Sunyaev-Zeldovich Images of Galaxy Clusters using Auto-Encoders
• The Halo Mass-Temperature Relation for Clusters, Groups, and Galaxies
• Probing the azimuthal environment of galaxies around clusters. From cluster core to cosmic filaments
• MultiCAM: A multivariable framework for connecting the mass accretion history of haloes with their properties
• A Machine Learning Approach to Enhancing eROSITA Observations
• Identifying Galaxy Cluster Mergers with Deep Neural Networks using Idealized Compton-y and X-ray maps
• Triaxiality in galaxy clusters: Mass versus Potential reconstructions
• The eventful life journey of galaxy clusters. I. Impact of DM halo and ICM properties on their full assembly histories
• Shape and connectivity of groups and clusters: Impact of dynamical state and accretion history
• The probability distribution of 3-D shapes of galaxy clusters from 2-D X-ray images
• Revisiting Galaxy Cluster Scaling Relations through Dark Matter-Gas Coherence: Scatter Dependence on Dynamical State
• Timing the last major merger of galaxy clusters with large halo sparsity
• The eventful life journey of galaxy clusters. II. Impact of mass accretion on the thermodynamical structure of the ICM