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Slow-moving galaxies in the cores of X-ray emitting clusters can accrete large quantities of cooling gas. The accretion flow is most likely to occur in a subsonic fashion, stagnating at some finite radius. We apply these ideas to NGC 1275 in the Perseus cluster, and suggest that it explains the soft X-ray enhancement in that region, as well as the stationary optical filaments.
Fabian et al. (Sat,) studied this question.