Distributed heating and disruption of a cool core through gas sloshing: Abell 3581
Abstract
We present results of joint Chandra, JVLA, HST and narrow-band imaging of the nearby galaxy group Abell 3581. Galaxy groups have shallower potential wells compared with rich galaxy clusters. An important implication of this is that the mechanical output from an active galactic nucleus outburst is of the same order as the group binding energy. The effect of feedback may well be more devastating to the group atmosphere than on the cluster scale. We find evidence in the X-ray and Radio of a series of AGN outbursts which have changed rise direction over time dragging with them cool gas from the centre of the galaxy. The observed bubbles are not powerful enough to offset the radiative cooling within the cooling radius, however, sloshing motions of the core, probably responsible for the changing direction of the bubbles, are stripping the cool core and distributing this high metallically, low entropy gas over the inner 50 kpc. These bulk motions are capable of destroying the core within 1-2 Gyrs and are likely contributing to the distributed heating and cooling in the cluster.
- Publication:
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AAS/High Energy Astrophysics Division #14
- Pub Date:
- August 2014
- Bibcode:
- 2014HEAD...1411106C