Properties and metal abundances of clusters (Maughan+, 2008)

Details Properties and metal abundances of clusters (Maughan+, 2008) Properties and metal abundances of clusters (Maughan+, 2008)

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ycat..21740117m&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/174/117. Originally published in: 2008ApJS..174..117M

Physics

Clusters: Galaxy, X-Ray Sources, Abundances

Scientific paper

We have assembled a sample of 115 galaxy clusters at 0.10.5. The slope of the surface brightness profiles at large radii were steeper on average by 15% than the slope obtained by fitting a simple {beta}-model to the emission. This slope was also found to be correlated with cluster temperature, with some indication that the correlation is weaker for the clusters at z>0.5. We measured the mean metal abundance of the cluster gas as a function of redshift and found significant evolution, with the abundances dropping by 50% between z=0.1 and z~1. This evolution was still present (although less significant) when the cluster cores were excluded from the abundance measurements, indicating that the evolution is not solely due to the disappearance of relaxed, cool core clusters (which are known to have enhanced core metal abundances) from the population at z>~0.5.
(3 data files).

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