Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 411, Issue 3, Pages 1833-1842Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2010.17812.x
Keywords
galaxies: active; galaxies: clusters: general; galaxies: clusters: individual: AWM 4; galaxies: clusters: intracluster medium; galaxies: individual: NGC 6051; X-rays: galaxies: clusters
Categories
Funding
- National Aeronautics and Space Administration [GO8-9127X-R]
- NASA [NAS8-03060]
- European Community
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We use a Chandra observation of the poor cluster AWM 4 to map the temperature and abundance of the intracluster medium, so as to examine the influence of the central radio galaxy on its environment. While the cluster core is generally enriched to near-solar abundances, we find evidence of supersolar abundances correlated with the radio jets, extending similar to 35 kpc from the core of the central dominant galaxy NGC 6051 along its minor-axis. We conclude that the enriched gas has been transported out of the central galaxy through the action of the radio source. We estimate the excess mass of iron in the entrained gas to be similar to 1.4 x 10(6)M(circle dot) and find that this can be produced in the core of NGC 6051 within the time-scale of the active galactic nucleus (AGN) outburst. The energy required to transport this gas to its current location is similar to 4.5 x 10(57) erg, a significant fraction of the estimated total mechanical energy output of the AGN, though this estimate is dependent on the degree of enrichment of the uplifted gas. The larger near-solar abundance region is also compatible with enrichment by metals mixed outwards from NGC 6051 over a much longer time-scale.
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