The amazing diversity in the hot gas content of an X-ray unbiased massive galaxy clusters sample

Abstract

We aim to determine the intrinsic variety, at a given mass, of the properties of the intracluster medium in clusters of galaxies. This requires a cluster sample selected independently of the intracluster medium content for which reliable masses and subsequent X-ray data can be obtained. We present one such sample, consisting of 34 galaxy clusters selected independently of their X-ray properties in the nearby ($0.050<z<0.135$) Universe and mostly with $14<\log M_{500}/M_{\odot }\lesssim 14.5$, where masses are dynamically estimated. We collected the available X-ray observations from the archives and then observed the remaining clusters with the low-background Swift X-ray telescope, which is extremely useful for sampling a cluster population expected to have low surface brightness. We found that clusters display a large range (up to a factor 50) in X-ray luminosities within $r_{500}$ at a given mass, whether or not the central emission ($r<0.15r_{500}$) is excised, unveiling a wider cluster population than seen in Sunayev-Zeldovich surveys or inferred from the population seen in X-ray surveys. The measured dispersion is $0.5$ dex in $L_X$ at a given mass.

A&A, in press. Version with slightly improved english and bigger figures

References in corpus (14)

• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• Galaxy And Mass Assembly (GAMA): end of survey report and data release 2
• Virial Scaling of Massive Dark Matter Halos: Why Clusters Prefer a High Normalization Cosmology
• The Representative XMM-Newton Cluster Structure Survey (REXCESS) of an X-ray Luminosity Selected Galaxy Cluster Sample
• The relation between velocity dispersion and mass in simulated clusters of galaxies: dependence on the tracer and the baryonic physics
• The Lx-Yx Relation: Using Galaxy Cluster X-Ray Luminosity as a Robust, Low Scatter Mass Proxy
• The X-Ray Luminosity--Mass Relation for Local Clusters of Galaxies
• Galaxy And Mass Assembly (GAMA): autoz spectral redshift measurements, confidence and errors
• The physics inside the scaling relations for X-ray galaxy clusters: gas clumpiness, gas mass fraction and slope of the pressure profile
• Cosmological simulations of galaxy clusters with feedback from active galactic nuclei: profiles and scaling relations
• The insignificant evolution of the richness-mass relation of galaxy clusters
• Scaling relations of the colour-detected cluster RzCS 052 at z=1.016 and of some other high redshift clusters
• Making the observational parsimonious richness a working mass proxy
• Effect of asphericity in caustic mass estimates of galaxy clusters

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• Why are some galaxy clusters underluminous? The very low concentration of the CL2015 mass profile
• Evolution of the degree of substructures in simulated galaxy clusters
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