期刊
ASTRONOMY & ASTROPHYSICS
卷 379, 期 1, 页码 107-114出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20011317
关键词
galaxies : clusters : individual : Abell 496; galaxies : clusters : general; galaxies : abundances; X-rays : galaxies : clusters
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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