The metal contents of two groups of galaxies

Abstract

The hot gas in clusters and groups of galaxies is continuously being enriched with metals from supernovae and stars. It is well established that the enrichment of the gas with elements from oxygen to iron is mainly caused by supernova explosions. The origins of nitrogen and carbon are still being debated. Possible candidates include massive, metal-rich stars, early generations of massive stars, intermediate or low mass stars and Asymptotic Giant Branch (AGB) stars. In this paper we accurately determine the metal abundances of the gas in the groups of galaxies NGC 5044 and NGC 5813, and discuss the nature of the objects that create these metals. We mainly focus on carbon and nitrogen. We use spatially-resolved high-resolution X-ray spectroscopy from XMM-Newton. For the spectral fitting, multi-temperature hot gas models are used. The abundance ratios of carbon over oxygen and nitrogen over oxygen that we find are high compared to the ratios in the stars in the disk of our Galaxy. The oxygen and nitrogen abundances we derive are similar to what was found in earlier work on other giant ellipticals in comparable environments. We show that the iron abundances in both our sources have a gradient along the cross-dispersion direction of the Reflection Grating Spectrometer (RGS). We conclude that it is unlikely that the creation of nitrogen and carbon takes place in massive stars, which end their lives as core-collapse supernovae, enriching the medium with oxygen because oxygen should then also be enhanced. Therefore we favour low-and intermediate mass stars as sources of these elements. The abundances in the hot gas can best be explained by a 30-40% contribution of type Ia supernovae based on the measured oxygen and iron abundances and under the assumption of a Salpeter Initial Mass Function (IMF).

arXiv commentAccepted for publication in A&A, 12 pages, 10 figures. Data points on which figs 4,5,8 and 9 are based are present as comment in the source file

References in corpus (46)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• The SAURON project -- IX. A kinematic classification for early-type galaxies
• Nucleosynthesis Yields of Core-Collapse Supernovae and Hypernovae, and Galactic Chemical Evolution
• High Resolution X-ray Spectroscopic Constraints on Cooling-Flow Models for Clusters of Galaxies
• Quantifying the uncertainties of chemical evolution studies. II. Stellar yields
• The 2-8 keV cosmic X-ray background spectrum as observed with XMM-Newton
• Population Synthesis in the Blue IV: Accurate Model Predictions for Lick Indices and UBV Colors in Single Stellar Populations
• Chemical composition of 90 F and G disk dwarfs
• Oxygen, Carbon and Nitrogen evolution in galaxies
• XMM-Newton Observation of Solar Wind Charge Exchange Emission
• A new approach to analyzing solar coronal spectra and updated collisional ionization equilibrium calculations. II. Additional ionization rate coefficients
• Constraints on the Physics of Type Ia Supernovae from the X-Ray Spectrum of the Tycho Supernova Remnant
• Spatially resolved X-ray spectroscopy of cooling clusters of galaxies
• Radial temperature profiles for a large sample of galaxy clusters observed with XMM-Newton
• The cluster gas mass fraction as a cosmological probe: a revised study
• The XMM-Newton EPIC Background: Production of Background Maps and Event Files
• Shocks and Cavities from Multiple Outbursts in the Galaxy Group NGC 5813: A Window to AGN Feedback
• Measuring Cluster Temperature Profiles with XMM/EPIC
• Chemical enrichment in the cluster of galaxies Hydra A
• The origin of primary nitrogen in galaxies
• The origin and chemical evolution of carbon in the Galactic thin and thick disks
• Constraining supernova models using the hot gas in clusters of galaxies
• A Chandra Survey of Early-Type Galaxies, I: Metal Enrichment in the ISM
• Temperature and abundance profiles of hot gas in galaxy groups - I. Results and statistical analysis
• The elemental abundances in the intracluster medium as observed with XMM-Newton
• Thermal X-ray emission from shocked ejecta in Type Ia Supernova Remnants. Prospects for explosion mechanism identification
• Constraints on turbulent pressure in the X-ray halos of giant elliptical galaxies from resonant scattering
• Metal-rich multi-phase gas in M87: AGN-driven metal transport, magnetic-field supported multi-temperature gas, and constraints on non-thermal emission observed with XMM-Newton
• XMM-Newton and Chandra Observations of the Galaxy Group NGC 5044. II. Metal Abundances and Supernova Fraction
• Chemical evolution in Sersic 159-03 observed with XMM-Newton
• Anisotropic Metal-enriched Outflows Driven by AGN in Clusters of Galaxies
• The Persistence of Memory, or How the X-Ray Spectrum of SNR 0509-67.5 Reveals the Brightness of its Parent Type Ia Supernova
• Isotropic AGN Heating with Small Radio Quiet Bubbles in the NGC 5044 Group
• XMM-Newton EPIC background modeling for extended sources
• The X-ray cavities, filaments and cold fronts in the core of the galaxy group NGC 5044
• The Evolution of Carbon and Oxygen in the Bulge and Disk of the Milky Way
• XMM-Newton high-resolution spectroscopy reveals the chemical evolution of M 87
• Metal enrichment processes
• High resolution soft X-ray spectroscopy of the elliptical galaxy NGC 5044. Results from the reflection grating spectrometer on-board XMM-Newton
• The origin of carbon: Low-mass stars and an evolving, initially top-heavy IMF?
• Cold fronts and multi-temperature structures in the core of Abell 2052
• Stellar mass-loss, rotation and the chemical enrichment of early type galaxies
• On the Contribution of Unresolved Galactic Stars to the Diffuse Soft X-ray Background
• Metal Abundances in the ICM as a Diagnostics of the Cluster History

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• Calcium-rich Gap Transients: Solving the Calcium Conundrum in the Intracluster Medium
• Mass-invariance of the iron enrichment in the hot haloes of massive ellipticals, groups, and clusters of galaxies
• Solar chemical composition in the hot gas of cool-core ellipticals, groups, and clusters of galaxies
• Structures and components in galaxy clusters: observations and models
• The origin of the chemical elements in cluster cores
• Nitrogen abundance in the X-ray halos of clusters and groups of galaxies
• Core to Cosmic Edge: SIMBA-C's New Take on Abundance Profiles in the Intragroup Medium at z = 0