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.
@article{arxiv.1208.2990,
title = {Large-scale Motions in the Perseus Galaxy Cluster},
author = {A. Simionescu and N. Werner and O. Urban and S. W. Allen and A. C. Fabian and J. S. Sanders and A. Mantz and P. E. J. Nulsen and Y. Takei},
journal= {arXiv preprint arXiv:1208.2990},
year = {2015}
}
Comments
6 pages, 6 figures, accepted for publication in ApJ