The nature of the variable millimetre-selected AGN in the Brightest Cluster Galaxy of Abell 851
We present the detection of a bright 3mm continuum source in the brightest cluster galaxy (BCG) in Abell 0851 (z = 0.411) with the NOrthern Extended Millimeter Array (NOEMA). When this detection is compared to other multifrequency observations across 21cm-100μm, including new Arcminute Microkelvin Imager 15 GHz observations, we find evidence for a relatively flat, variable core source associated with the BCG. The radio power and amplitude of variability observed in this galaxy is consistent with the cores in lower redshift BCGs in X-ray-selected clusters, and the flat mm-cm spectrum is suggestive of the BCG being a low-luminosity active galactic nucleus archetype. The discovery of this system could provide a basis for a long-term study of the role of low-luminosity radio mode 'regulatory' feedback in massive clusters.
Item Type | Article |
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Additional information | 5 pages, 3 figures Cheale, R. A., Geach, J. E., Edge, A. C., Perrott, Y. C., & Cantwell, T. (2018). The nature of the variable millimetre-selected AGN in the Brightest Cluster Galaxy of Abell 851. Monthly Notices of the Royal Astronomical Society: Letters, 481(1), L54– L58. DOI: 10.1093/mnrasl/sly161 This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society: Letters. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Keywords | astro-ph.ga, techniques: interferometric, galaxies: clusters: individual: (a851, galaxies: elliptical and lenticular, cd- galaxies: evolution, cl 0939+4713), galaxies: clusters: individual:abell 851, astronomy and astrophysics, space and planetary science |
Date Deposited | 15 May 2025 13:55 |
Last Modified | 31 May 2025 00:18 |
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