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arXiv 0808.1471astro-ph
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复杂星系团Abell 514:用XMM -牛顿卫星获得的新结果

The complex galaxy cluster Abell 514: New results obtained with the XMM - Newton satellite

J. Weratschnig, M. Gitti, S. Schindler, K. Dolag

摘要:

我们研究了Abell 514星系团的X射线形态和动力学。此外,为了研究团簇内介质与磁场的关系,还研究了团簇的X射线性质与法拉第旋转测度之间的关系。我们使用两个组合的XMM -牛顿点,它们被分成三个不同的观测。这些数据使我们能够高精度地评估整个星系团的性质,如温度和金属丰度。此外,我们还计算了温度图和金属丰度分布,并利用它们详细研究了团簇的动力学状态。Abell 514代表了一个有趣的合并星团,在X射线图像以及温度和丰度分布中可以看到许多子结构。Abell 514的新XMM -牛顿数据证实了Dolag等人(2001)提出的X射线亮度与旋转度量的sigma之间的关系(S_X-sigma_RM关系)。

英文摘要:

We study the X-ray morphology and dynamics of the galaxy cluster Abell 514. Also, the relation between the X-ray properties and Faraday Rotation measures of this cluster are investigated in order to study the connection of magnetic fields and the intra-cluster medium. We use two combined XMM - Newton pointings that are split into three distinct observations. The data allow us to evaluate the overall cluster properties like temperature and metallicity with high accuracy. Additionally, a temperature map and the metallicity distribution are computed, which are used to study the dynamical state of the cluster in detail. Abell 514 represents an interesting merger cluster with many substructures visible in the X-ray image and in the temperature and abundance distributions. The new XMM - Newton data of Abell 514 confirm the relation between the X-ray brightness and the sigma of the Rotation Measure (S_X - sigma_RM relation) proposed by Dolag et al. (2001).

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