A phenomenological model of galaxy clusters

Abstract

We present a simple model to describe the dark matter density, the gas density, and the gas temperature profiles of galaxy clusters. Analytical expressions for these quantities are given in terms of only five free parameters with a clear physical meaning: the mass M of the dark matter halo (or the characteristic temperature T_0), the characteristic scale radius a, the cooling radius in units of a (0<alpha<1), the central temperature in units of T_0 (0<t<1), and the asymptotic baryon fraction in units of the cosmic value (f~1). It is shown that our model is able to reproduce the three-dimensional density and temperature profiles inferred from X-ray observations of real clusters within a 20 per cent accuracy over most of the radial range. Some possible applications are briefly discussed.

7 pages, 4 figures, submitted to MNRAS

References in corpus (10)

• A Universal Density Profile from Hierarchical Clustering
• Chandra sample of nearby relaxed galaxy clusters: mass, gas fraction, and mass-temperature relation
• Tracing cosmic evolution with clusters of galaxies
• Empirical models for Dark Matter Halos. I. Nonparametric Construction of Density Profiles and Comparison with Parametric Models
• The Temperature Structure of 30 Nearby Clusters Observed with ASCA. Similarity of Temperature Profiles
• The origin of cold fronts in the cores of relaxed galaxy clusters
• Filtering techniques for the detection of Sunyaev-Zel'dovich clusters in multifrequency CMB maps
• A FIRST DETERMINATION OF THE SURFACE DENSITY OF GALAXY CLUSTERS AT VERY LOW X--RAY FLUXES
• The radial structure of galaxy groups and clusters
• The Brera Multi-scale Wavelet (BMW) ROSAT HRI source catalog. I: the algorithm

Cited by in corpus (22)

• LoCuSS: The slow quenching of star formation in cluster galaxies and the need for pre-processing
• LoCuSS: First Results from Strong-lensing Analysis of 20 Massive Galaxy Clusters at z~0.2
• LoCuSS: the connection between brightest cluster galaxy activity, gas cooling and dynamical disturbance of X-ray cluster cores
• LoCuSS: The steady decline and slow quenching of star formation in cluster galaxies over the last four billion years
• ACCESS - V. Dissecting ram-pressure stripping through integral-field spectroscopy and multi-band imaging
• Exploring the Energetics of Intracluster Gas with a Simple and Accurate Model
• LoCuSS: Connecting the Dominance and Shape of Brightest Cluster Galaxies with the Assembly History of Massive Clusters
• LoCuSS: A Dynamical Analysis of X-ray AGN in Local Clusters
• The XMM Cluster Survey: Forecasting cosmological and cluster scaling-relation parameter constraints
• An Analytic Model of the Physical Properties of Galaxy Clusters
• LoCuSS: The infall of X-ray groups onto massive clusters
• The baryon budget on the galaxy group/cluster boundary
• X-ray modelling of galaxy cluster gas and mass profiles
• The Sunyaev-Zel'dovich effect in WMAP data
• The cosmological free-free signal from galaxy groups and clusters
• A Simple Physical Model for the Gas Distribution in Galaxy Clusters
• Hydrostatic gas distributions: global estimates of temperature and abundance
• ACCESS IV: The quenching of star formation in a cluster population of dusty S0s
• Probing Cosmology and Galaxy Cluster Structure with the Sunyaev-Zel'dovich Decrement vs. X-ray Temperature Scaling Relation
• Sunyaev-Zel'dovich effect in the Virgo cluster from WMAP and ROSAT data
• CHEX-MATE: A non-parametric deep learning technique to deproject and deconvolve galaxy cluster X-ray temperature profiles
• Properties of the Intracluster Medium Assuming an Einasto Dark Matter Profile