XMM-Newton observations of the cluster of galaxies Abell 496 -: Measurements of the elemental abundances in the intracluster medium

被引：70
|
作者：
Tamura, T
Bleeker, JAM
Kaastra, JS
Ferrigno, C
Molendi, S
机构：
[1] SRON, Natl Inst Space Res, NL-3584 CA Utrecht, Netherlands
[2] IFC Milan, I-20133 Milan, Italy
来源：
ASTRONOMY & ASTROPHYSICS | 2001年 / 379卷 / 01期
关键词：
galaxies : clusters : individual : Abell 496; galaxies : clusters : general; galaxies : abundances; X-rays : galaxies : clusters;
D O I：
10.1051/0004-6361:20011317
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The results from XMM-Newton observations of the relaxed cluster of galaxies Abell 496 are presented. The spatially-resolved X-ray spectra taken by the European Photon Imaging Cameras show a temperature drop and a Fe abundance increase in the intra-cluster medium (ICM) towards the cD galaxy at the cluster center. The abundances of Si and S also show a central enhancement. High resolution soft X-ray spectra obtained with the Reflection Grating Spectrometers provides a strong constraint on the temperature structure in the central cool plasma. Furthermore, the O abundance at the cluster core is accurately measured based on the O VIII Ly alpha line detected with the RGS. Contrary to the Si, S, and Fe abundances, the O abundance is radially constant over the cluster.
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收藏
页码：107 / 114
页数：8
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