The peculiar cooling flow cluster RX J0820.9+0752

Abstract

This poster is a summary of a paper on the subject (Bayer-Kim et al. 2002) that has been submitted for publication in MNRAS. We present X-ray, H alpha, radio, and optical data, both imaging and spectroscopy, of the cluster RX J0820.9+0752 and its peculiar central cluster galaxy (CCG). We announce the discovery of several isolated off-nuclear patches of blue light with strong line-emssion (total L(H alpha) ~ 10^{42}{ergs}^{-1}) and distinct ionizational and kinematic properties, embedded in a region of H alpha/X-ray emission. We propose and investigate a scenario in which a secondary galaxy also featured in our observations has moved through a cooling wake produced by the CCG, thereby producing the observed clumpy morphology and helping to trigger star-formation within the clumps.

5 pages; 3 figures; to be published in the Proceedings of the Conference on Matter and Energy in Clusters of Galaxies, Chung-Li, Taiwan (2002), editors: S. Bowyer and C. Y. Hwang

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• Dynamical-Friction Galaxy-Gas Coupling and Cluster Cooling Flows
• Powerful obscured AGN among X-ray hard, optically-dim serendipitous Chandra sources
• Integral field spectroscopy of H-alpha emission in cooling flow cluster cores: disturbing the molecular gas reservoir
• LOFAR Observations of X-ray Cavity Systems
• The Relation Between Line Emission and Brightest Cluster Galaxies in Three Exceptional Clusters: Evidence for Gas Cooling from the ICM
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• An enormous molecular gas flow in the RXJ0821+0752 galaxy cluster
• A ${}^{13}$CO Detection in a Brightest Cluster Galaxy
• A giant Ly$\alpha$ nebula in the core of an X-ray cluster at $z=1.99$: implications for early energy injection
• Warming rays in cluster cool cores
• The cold circumgalactic environment of MAMMOTH-I: dynamically cold gas in the core of an Enormous Ly-alpha Nebula
• Cooling of X-ray Emitting Gas by Heat Conduction in the Center of Cooling Flow Clusters
• Hidden Cooling Flows in Clusters of Galaxies II: A Wider Sample
• A BCG with offset cooling: is the AGN feedback cycle broken in A2495?
• Cooling by Heat Conduction Inside Magnetic Flux Loops and the Moderate Cluster Cooling Flow Model
• Active Galaxies and Cluster Gas
• A first Chandra view of the cool core cluster A1668: offset cooling and AGN feedback cycle
• Star Formation Histories and Stellar Dynamics in the Central Galaxies of RX J0820.9+0752, A1835, and PKS 0745-191