The nature of the variable millimetre-selected AGN in the Brightest Cluster Galaxy of Abell 851
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Author
Cheale, R. A.
Geach, J. E.
Edge, A. C.
Perrott, Y. C.
Cantwell, T.
Attention
2299/20771
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.
Publication date
2018-11-21Published in
Monthly Notices of the Royal Astronomical Society: LettersPublished version
https://doi.org/10.1093/mnrasl/sly161Other links
http://hdl.handle.net/2299/20771Metadata
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