The nature of the variable millimetre-selected AGN in the Brightest Cluster Galaxy of Abell 851

R. A. Cheale, J. E. Geach, A. C. Edge, Y. C. Perrott, T. Cantwell

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Abstract

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.

Original languageEnglish
Pages (from-to)L54–L58
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume481
Issue number1
Early online date31 Aug 2018
DOIs
Publication statusPublished - 21 Nov 2018

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

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