J/A+A/420/135 Abundances in intracluster medium with XMM (Tamura+, 2004)
Elemental abundances in the intracluster medium as observed with XMM-Newton.
Tamura T., Kaastra J.S., Den Herder J.W.A., Bleeker J.A.M., Peterson J.R.
<Astron. Astrophys., 420, 135-146 (2004)>
=2004A&A...420..135T 2004A&A...420..135T
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Abundances
Keywords: galaxies: clusters: general - galaxies: abundances -
X-rays: galaxies: clusters
Abstract:
XMM-Newton observations of 19 galaxy clusters are used to measure the
elemental abundances and their spatial distributions in the
intracluster medium. The sample mainly consists of X-ray bright and
relaxed clusters with a cD galaxy. Along with detailed Si, S and Fe
radial abundance distributions within 300-700kpc in radius, the O
abundances are accurately derived in the central region of the
clusters. The Fe abundance maxima towards the cluster center, possibly
due to the metals from the cD galaxy, are spatially resolved. The Si
and S abundances also exhibit central increases in general, resulting
in uniform Fe-Si-S ratios within the cluster. In contrast, the O
abundances are in general uniform over the cluster. The mean O to Fe
ratio within the cluster core is sub-solar, while that of the cluster
scale is larger than the solar ratio. These measurements indicate that
most of the Fe-Si-S and O in the intracluster medium have different
origins, presumably in supernovae Ia and II, respectively. The
obtained Fe and O mass are also used to discuss the past star
formation history in clusters.
Description:
We analyzed 19 clusters taken from GT and PV observations of XMM-Newton
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 48 53 Abundances (scaled to the solar ratio) obtained
from the EPIC analysis for each cluster.
table4.tex 98 127 LaTeX version of the table
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2002)
IX/37 : XMM-Newton Serendipitous Source Catalogue (1XMM) (XMM-SSC, 2003)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Cluster Cluster name
14 I1 --- Region [0/2] Integration region (1)
16- 19 F4.2 Sun Fe/H Fe/H abundance
21- 24 F4.2 Sun e_Fe/H rms uncertainty on Fe/H
26- 28 F3.1 Sun O/Fe ? O/Fe abundance (2)
30- 32 F3.1 Sun e_O/Fe ? rms uncertainty on O/Fe (2)
34- 36 F3.1 Sun Si/Fe ? Si/Fe abundance (2)
38- 40 F3.1 Sun e_Si/Fe ? rms uncertainty on Si/Fe (2)
42- 44 F3.1 Sun S/Fe ? S/Fe abundance (2)
46- 48 F3.1 Sun e_S/Fe ? rms uncertainty on S/Fe (2)
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Note (1): Integration regions:
0: for radii between 0- 50 in h-1kpc
1: for radii between 50-200 in h-1kpc
2: for radii between 200-500 in h-1kpc
Note (2): Values with errors larger than 3 times solar are not presented
(indicated by ---)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Jul-2004