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arXiv · 1208.2990

Large-scale Motions in the Perseus Galaxy Cluster

A. Simionescu·N. Werner·O. Urban·S. W. Allen·A. C. Fabian·J. S. Sanders·A. Mantz·P. E. J. Nulsen·Y. Takei
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Abstract

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.

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A. Simionescu, N. Werner, O. Urban, S. W. Allen, A. C. Fabian, J. S. Sanders, A. Mantz, P. E. J. Nulsen, Y. Takei. 2012-08-14. Large-scale Motions in the Perseus Galaxy Cluster. https://doi.org/10.1088/0004-637x/757/2/182

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