Volume 487, Number 2, August IV 2008
|Page(s)||461 - 466|
|Section||Cosmology (including clusters of galaxies)|
|Published online||09 June 2008|
Radial metallicity profiles for a large sample of galaxy clusters observed with XMM-Newton
Università degli Studi di Milano, Dip. di Fisica, via Celoria 16, 20133 Milano, Italy
2 INAF - IASF Milano, via Bassini 15, 20133 Milano, Italy e-mail: email@example.com
Accepted: 4 June 2008
Aims. We measured radial metallicity profiles for a sample of ≈50 hot, intermediate redshift galaxy clusters, selected from the XMM-Newton archive.
Methods. As in our previous paper, we used background modeling rather than background subtraction, and the Cash statistic rather than the . This method requires a careful characterization of all background components. We also performed Montecarlo simulations to assess systematic effects.
Results. The mean metallicity profile shows a peak in the center, and gently declines out to 0.2 R180. Beyond 0.2 R180 the metallicity is ≈0.2 solar and, at variance with recently published expectations based on simulations, consistent with being flat. We find no evidence of profile evolution from to . When comparing our mean profile to those obtained by recent works with BeppoSAX and Chandra, we find remarkable agreement over the entire radial range.
Key words: X-rays: galaxies: clusters / galaxies: clusters: general / cosmology: observations
© ESO, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.