Towards a characterization of X-ray galaxy clusters for cosmology

Abstract

In the framework of the hierarchical model the intra-cluster medium properties of galaxy clusters are tightly linked to structure formation, which makes X-ray surveys well suited for cosmological studies. To constrain cosmological parameters accurately by use of galaxy clusters in X-ray surveys, a better understanding of selection effects related to the detection method is needed. We aim at a better understanding of galaxy cluster morphologies to include corrections between the different core types and covariances with X-ray luminosities in selection functions. We stress the morphological deviations between a newly described surface brightness (SB) profile characterization and a commonly used single $\beta$-model. We investigate a novel approach to describe SB profiles, where the excess cool-core emission in the galaxy cluster centres is modelled using wavelet decomposition. Morphological parameters and the residuals are compared to classical single $\beta$-models. Using single $\beta$-models to describe the ensemble of overall SB profiles leads on average to a non-zero bias ($0.032\pm 0.003$) in the outer part of the clusters, i.e. a $\sim 3\%$ systematic difference in the SB at large radii. In addition $\beta$-models show a general trend towards underestimating the flux in the outskirts for smaller core radii. Fixing the $\beta$ parameter to $2/3$ doubles the bias and increases the residuals from a single $\beta$-model up to more than $40\%$. Modelling the core region in the fitting procedure reduces the impact of these two effects significantly. We find a positive scaling between shape parameters and temperature, as well as a negative correlation ($\sim -0.4$) between extent and luminosity. Our non-parametric analysis of the self-similar scaled emission measure profiles indicates no systematic core-type differences of median profiles in the galaxy clusters outskirts.

References in corpus (41)

• emcee: The MCMC Hammer
• Statistical Properties of X-ray Clusters: Analytic and Numerical Comparisons
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• Simulations of X-ray Clusters
• The Mass Function of an X-Ray Flux-Limited Sample of Galaxy Clusters
• Calibration of X-ray absorption in our Galaxy
• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• Galaxy cluster X-ray luminosity scaling relations from a representative local sample (REXCESS)
• The Shape of Dark Matter Halos: Dependence on Mass, Redshift, Radius, and Formation
• The Northern ROSAT All-Sky (NORAS) Galaxy Cluster Survey I: X-ray Properties of Clusters Detected as Extended X-ray Sources
• A New Robust Low-Scatter X-ray Mass Indicator for Clusters of Galaxies
• What is a Cool-Core Cluster? A Detailed Analysis of the Cores of the X-ray Flux-Limited HIFLUGCS Cluster Sample
• A Catalog of 200 Galaxy Clusters Serendipitously Detected in the ROSAT PSPC Pointed Observations
• Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources
• Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters
• The Observed Growth of Massive Galaxy Clusters II: X-ray Scaling Relations
• The Cool-Core Bias in X-ray Galaxy Cluster Samples I: Method And Application To HIFLUGCS
• Searching for Cool Core Clusters at High redshift
• Universal thermodynamic properties of the intracluster medium over two decades in radius in the X-COP sample
• Outer Regions of the Cluster Gaseous Atmospheres
• Hydrodynamic Simulation of Non-thermal Pressure Profiles of Galaxy Clusters
• Self-similar scaling and evolution in the galaxy cluster X-ray Luminosity-Temperature relation
• The XMM-LSS survey: the Class 1 cluster sample over the initial 5 square degrees and its cosmological modelling
• The Lx-Yx Relation: Using Galaxy Cluster X-Ray Luminosity as a Robust, Low Scatter Mass Proxy
• The gas distribution in the outer regions of galaxy clusters
• Weighing the Giants V: Galaxy Cluster Scaling Relations
• A statistically-selected Chandra sample of 20 galaxy clusters -- I. Temperature and cooling time profiles
• Scaling relations for galaxy clusters: properties and evolution
• The cool core state of Planck SZ-selected clusters versus X-ray selected samples: evidence for cool core bias
• A Comparison of X-ray and Strong Lensing Properties of Simulated X-ray Clusters
• Lack of cooling flow clusters at z>0.5
• Scaling relations and mass calibration of the X-ray luminous galaxy clusters at z~0.2: XMM-Newton observations
• The XXL Survey XXV. Cosmological analysis of the C1 cluster number counts
• HICOSMO - Cosmology with a complete sample of galaxy clusters: I. Data analysis, sample selection and luminosity-mass scaling-relation
• The X-ray surface brightness profiles of hot galaxy clusters up to z~0.8: evidence for self-similarity and constraints on Omega_0
• The Lx-Tvir relation in galaxy clusters: Effects of radiative cooling and AGN heating
• Synthetic simulations of the extragalactic sky seen by eROSITA. I. Pre-launch selection functions from Monte-Carlo simulations
• Robust quantitative measures of cluster X-ray morphology, and comparisons between cluster characteristics
• Constraining Cluster Physics with the Shape of X-ray Clusters: Comparison of Local X-ray Clusters versus LCDM Clusters
• Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys
• Gas rotation in galaxy clusters: signatures and detectability in X-rays

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• Full-sky photon simulation of clusters and active galactic nuclei in the soft X-rays for eROSITA
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• The mass function dependence on the dynamical state of dark matter haloes
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• RXJ0437+00: Constraining Dark Matter with Exotic Gravitational Lenses
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• AXES-SDSS: comparison of SDSS galaxy groups with all-sky X-ray extended sources
• Clustering of CODEX clusters
• Average X-ray properties of galaxy groups. From Milky Way-like halos to massive clusters
• The SRG/eROSITA all-sky survey: The morphologies of clusters of galaxies I: A catalogue of morphological parameters
• AXES-2MRS: A new all-sky catalogue of extended X-ray galaxy groups
• X-ray cluster cosmology
• Toward the low-scatter selection of X-ray clusters: Galaxy cluster detection with eROSITA through cluster outskirts
• A Novel Method for Estimating the Ambient Medium Density Around Distant Radio Sources from Their Observed Radio Spectra
• The global energetics of radio AGN kinetic feedback in the local universe
• Tracing the assembly histories of galaxy clusters in the nearby universe
• Modelling the selection of galaxy groups with end to end simulations
• SpectrAx: Spectral Search of Axion-Like Particles Using Multi-Band Observations of Galaxy Clusters from SKA, SO, CMB-S4 and eROSITA
• Galaxy cluster count cosmology with simulation-based inference
• Galaxy-cluster-stacked Fermi-LAT II: extended central hadronic signal
• Bound or blown: the fate of hot gas in galaxy groups
• Do gas-poor galaxy clusters have different galaxy populations? The positive covariance of hot and cold baryons