Issue |
A&A
Volume 508, Number 1, December II 2009
|
|
---|---|---|
Page(s) | 191 - 200 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361/200912933 | |
Published online | 01 October 2009 |
Metallicity map of the galaxy cluster A3667
1
Institut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria e-mail: Lorenzo.Lovisari@uibk.ac.at
2
Université de Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, France
Received:
20
July
2009
Accepted:
17
September
2009
We use XMM-Newtondata of the merging cluster Abell 3667 to
analyze its metallicity distribution. A detailed abundance map of
the central Mpc region indicates that metals are
inhomogeneously distributed in the cluster showing a non-uniform and
very complex metal pattern. The highest peak in the map corresponds
to a cold region, slightly offset South of the X-ray center. This
could be interpreted as stripped gas due to a merger between a group
moving from NW towards the SE and the main cluster. We note several
clumps of high metallicity also in the opposite direction with
respect to the X-ray peak. Furthermore we determined abundances for
5 elements (O, Si, S, Ar, Fe) in four different regions of the
cluster. Comparisons between these observed abundances and
theoretical supernovae yields allow to get constraints on the
relative number of SN Ia and II contributing to the enrichment of
the intra-cluster medium. To reproduce the observed abundances of
the best determined elements (Fe, O and Si) in a region of
7′ around the X-ray center, 65–80% of SN II are
needed. The comparison between the metal map, a galaxy density
map obtained using 550 spectroscopically confirmed cluster members
and, our simulations suggest a recent merger between the main
cluster and the group in the SE.
Key words: galaxies: cluster: general / galaxies: abundances / X-rays: galaxies: clusters / galaxies: clusters: individual: Abell 3667
© ESO, 2009
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