Powering of Hα Filaments by Cosmic Rays
Cluster cool cores possess networks of line-emitting filaments. These
filaments are thought to originate via uplift of cold gas from cluster centers
by buoyant active galactic nuclei (AGN) bubbles, or via local thermal
instability in the hot intracluster medium (ICM). Therefore, the filaments are
either the signatures of AGN feedback or feeding of supermassive black holes.
Despite being characterized by very short cooling times, the filaments are
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