LARGE-SCALE MOTIONS IN THE PERSEUS GALAXY CLUSTER
LARGE-SCALE MOTIONS IN THE PERSEUS GALAXY CLUSTER
复制标题
英仙座星系团中的大规模运动
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Y. Takei
中科院分区：
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作者：
A. Simionescu;N. Werner;O. Urban;S. Allen;A. Fabian;J. Sanders;A. Mantz;P. Nulsen;Y. Takei
通过结合ROSAT PSPC，XMM-牛顿和朱雀X射线观测的大规模马赛克，我们提出了附近的X射线明亮的英仙座星系团的团内介质中的大规模运动的证据。这些运动是由几个交替和交错的X射线明亮，低温，低熵弧位于沿着东西轴，在半径范围从100千秒差距到超过百万秒差距。热力学特征定性类似于这些以前已经观察到的中心的冷核心集群，并成功地模拟为一个结果的气体晃动/旋转运动引起的轻微合并。我们的观察表明，这种晃动/旋转可以延伸到比以前认为的更大的半径，在接近维里半径的尺度上。
By combining large-scale mosaics of ROSAT PSPC, XMM-Newton, and Suzaku X-ray observations, we present evidence for large-scale motions in the intracluster medium of the nearby, X-ray bright Perseus Cluster. These motions are suggested by several alternating and interleaved X-ray bright, low-temperature, low-entropy arcs located along the east–west axis, at radii ranging from ∼10 kpc to over a Mpc. Thermodynamic features qualitatively similar to these have previously been observed in the centers of cool-core clusters, and were successfully modeled as a consequence of the gas sloshing/swirling motions induced by minor mergers. Our observations indicate that such sloshing/swirling can extend out to larger radii than previously thought, on scales approaching the virial radius.