The Halo Mass-Temperature Relation for Clusters, Groups, and Galaxies

Abstract

The halo mass-temperature relation for a sample of 216 galaxy clusters, groups, and individual galaxies observed by $Chandra$ X-ray Observatory is presented. Using accurate spectral measurements of their hot atmospheres, we derive the $M-T$ relation for systems with temperatures ranging between 0.4-15.0 keV. We measure the total mass of clusters, groups, and galaxies at radius $R_{2500}$, finding that the $M_{2500}\propto T^{\alpha }$ relation follows a power-law with $\alpha$ = 1.65$\pm$0.06. Our relation agrees with recent lensing studies of the $M-T$ relation at $R_{200}$ and is consistent with self-similar theoretical prediction and recent simulations. This agreement indicates that the $M-T$ relation is weakly affected by non-gravitational heating processes. Using lensing masses within $R_{200}$ we find $M_{200}-T$ follows a power-law with slope 1.61$\pm$0.19, consistent with the $M_{2500}-T$ relation. No evidence for a break or slope change is found in either relation. Potential biases associated with sample selection, evolution, and the assumption of hydrostatic equilibrium that may affect the scaling are examined. No significant impacts attributable to these biases are found. Non-cool-core clusters and early spirals produce higher scatter in the $M-T$ relation than cool-core clusters and elliptical galaxies.

12 pages, 4 figures, submitted to the Astrophysical Journal

References in corpus (16)

• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• Heating Hot Atmospheres with Active Galactic Nuclei
• Testing X-ray Measurements of Galaxy Clusters with Cosmological Simulations
• Systematics in the X-ray Cluster Mass Estimators
• Scaling Properties of a Complete X-ray Selected Galaxy Group Sample
• LoCuSS: Comparison of Observed X-ray and Lensing Galaxy Cluster Scaling Relations with Simulations
• Comparison of weak lensing masses and X-ray properties of galaxy clusters
• Galactic Dark Matter Halos and Globular Cluster Populations. III: Extension to Extreme Environments
• The impact of mechanical AGN feedback on the formation of massive early-type galaxies
• Physical viscosity in smoothed particle hydrodynamics simulations of galaxy clusters
• Enrichment and Pre-Heating in Intragroup Gas from Galactic Outflows
• LoCuSS: Hydrostatic Mass Measurements of the High-$L_X$ Cluster Sample -- Cross-calibration of Chandra and XMM-Newton
• Cosmological simulations of galaxy clusters with feedback from active galactic nuclei: profiles and scaling relations
• Large-Scale Structure Formation: from the first non-linear objects to massive galaxy clusters
• Entropy profiles in X-ray luminous galaxy clusters at z>0.1
• The Sloan Nearby Cluster Weak Lensing Survey