Ni abundance in the core of the Perseus cluster: An answer to the significance of resonant scattering

被引：27

作者：

Gastaldello, F ^{[1
]}

Molendi, S ^{[1
]}

机构：

[1] CNR, IASF, I-20133 Milan, Italy

来源：

ASTROPHYSICAL JOURNAL | 2004年 / 600卷 / 02期

关键词：

galaxies : abundances; galaxies; clusters; individual; (A426; Perseus); intergalactic medium; scattering; X-rays : galaxies;

D O I：

10.1086/379970

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using an XMM-Newton observation of the Perseus cluster we show that the excess in the flux of the 7 - 8 keV line complex previously detected by ASCA and BeppoSAX is due to an overabundance of nickel rather than to an anomalously high Fe He beta/Fe Healpha ratio. This observational fact leads to the main result that resonant scattering, which was assumed to be responsible for the supposed anomalous Fe He beta/Fe Healpha ratio, is no longer required. The absence of resonant scattering points toward the presence of significant gas motions ( either turbulent or laminar) in the core of the Perseus Cluster.

引用

收藏

页码：670 / 680

页数：11

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