Fe-bias in the cluster of galaxies Abell 2052

被引：0
|
作者：
de Plaa, J. [1 ]
Grange, Y. G. [1 ]
Kaastra, J. S. [1 ]
Werner, N. [2 ]
Simionescu, A. [2 ]
机构：
[1] SRON, Netherlands Inst Space Res, Utrecht, Netherlands
[2] Stanford Univ, KIPAC, Stanford, CA USA
来源：
X-RAY ASTRONOMY-2009: PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES, PROCEEDINGS | 2010年 / 1248卷
关键词：
Galaxy clusters; Chemical composition and chemical evolution; Intracluster matter; cooling flows;
D O I：
10.1063/1.3475236
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present radial profiles of the temperature and metallicity of the cluster of galaxies Abell 2052 obtained with XMM-Newton. The temperature is rising from 2 keV in the core of the cluster up to similar to 3 keV around 9'. The iron abundance profile as derived from single-temperature models shows a dip in the center of the cluster. The dip turns into a peak when multi-temperature models are used to fit the central 1'. This result is a dramatic example of so-called 'Fe bias'. The use of multi-temperature models is necessary in this cluster to obtain accurate abundance values.
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页码：289 / +
页数：2
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