Metal Production in Galaxy Clusters: The Non-Galactic Component

Abstract

The metallicity in galaxy clusters is expected to originate from the stars in galaxies, with a population dominated by high mass stars likely being the most important stellar component, especially in rich clusters. We examine the relationship between the metallicity and the prominence of galaxies as measured by the star to baryon ratio, M${}_{\ast }$/M${}_{bary}$. Counter to expectations, we rule out a metallicity that is proportional to M${}_{\ast }$/M${}_{bary}$, where the best fit has the gas phase metallicity decreasing with M${}_{\ast }$/M${}_{bary}$, or the metallicity of the gas plus the stars being independent of M${}_{\ast }$/M${}_{bary}$. This implies that the population of stars responsible for the metals is largely proportional to the total baryonic mass of the cluster, not to the galaxy mass within the cluster. If generally applicable, most of the heavy elements in the universe were not produced within galaxies.

13 pages, 3 figures, accepted to ApJ Letters

References in corpus (16)

• A Catalog of Galaxy Clusters Observed by XMM-Newton
• Do Hot Haloes Around Galaxies Contain the Missing Baryons?
• The Formation and Evolution of Intracluster Light
• Diffuse Optical Light in Galaxy Clusters II: Correlations with Cluster Properties
• On the Baryon Fractions in Clusters and Groups of Galaxies
• Temperature and abundance profiles of hot gas in galaxy groups - I. Results and statistical analysis
• Observations of metals in the intra-cluster medium
• A Chandra archival study of the temperature and metal abundance profiles in hot Galaxy Clusters at 0.1 < z < 0.3
• Temperature and abundance profiles of hot gas in galaxy groups - II. Implications for feedback and ICM enrichment
• The chemical enrichment of the ICM from hydrodynamical simulations
• Thermodynamical properties of the ICM from hydrodynamical simulations
• Where are the Cosmic Metals at z~3?
• Evolution of the metal content of the intra-cluster medium with hydrodynamical simulations
• The Extended Fe distribution in the intracluster medium and the implications regarding AGN Heating
• On Iron Enrichment, Star Formation, and Type Ia Supernovae in Galaxy Clusters
• The Radial Dependence of Temperature and Iron Abundance: Galaxy Clusters from z=0.14 to z=0.89

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