Tracing multiple generations of active galactic nucleus feedback in the core of Abell 262

Clarke, T. E. ; Blanton, E. L. ; Sarazin, C. L. ; Anderson, L. D. ; Gopal-Krishna, ; Douglass, E. M. ; Kassim, N. E. (2009) Tracing multiple generations of active galactic nucleus feedback in the core of Abell 262 The Astrophysical Journal, 697 (2). pp. 1481-1492. ISSN 0004-637X

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We present new radio and X-ray observations of Abell 262. The X-ray residual image provides the first evidence of an X-ray tunnel in this system while the radio data reveal that the central radio source is more than three times larger than previously known. We find that the well-known cluster-center S-shaped radio source B2 0149+35 is surrounded by extended emission to the east and southwest. The south-western extension is cospatial with the X-ray tunnel seen in our new Chandra images while the eastern extension shows three clumps of emission with the innermost coincident with a faint X-ray cavity. The outer two eastern radio extensions are coincident with a newly detected X-ray depression. We use the projected separation of the emission regions to estimate a lower limit of τrep = 28 Myr to the outburst repetition timescale of the central active galactic nucleus (AGN). The total energy input into the cluster over multiple outburst episodes is estimated to be 2.2 × 1058 erg, more than an order of magnitude larger than previously thought. The total AGN energy output determined from our new observations shows that the source should be capable of offsetting radiative cooling over several outburst episodes.

Item Type:Article
Source:Copyright of this article belongs to IOP Science.
Keywords:Cooling Flows; Galaxies: Clusters: General; Galaxies: Clusters: Individual (Abell 262); Intergalactic Medium; Radio Continuum: Galaxies; X-rays: Galaxies: Clusters
ID Code:76586
Deposited On:04 Jan 2012 07:13
Last Modified:09 Jan 2012 04:17

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