Discovery of a Large-scale Abundance Gradient in the Cluster of Galaxies AWM 7 with [ITAL]ASCA[/ITAL]
Open Access
- 20 November 1997
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 490 (1) , L33-L36
- https://doi.org/10.1086/311004
Abstract
A large-scale gradient in the metal abundance has been detected with ASCA from an X-ray bright cluster of galaxies, AWM 7. The metal abundance shows a peak of 0.5 solar at the center and smoothly declines to 0.2 solar at a radius of 500 kpc. The gas temperature is found to be constant at 3.8 keV. The radial distribution of iron can be fitted with a β model with β ~ 0.8 assuming the same core radius (115 kpc) as that of the intracluster medium. The metal distribution in AWM 7 suggests that the gas injected from galaxies is not efficiently mixed in the cluster space and traces the distribution of galaxies.Keywords
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