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.

引用

页码：107 / 114

页数：8

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