| Autor: |
Cheale, R A, Geach, J E, Edge, A C, Perrott, Y C, Cantwell, T |
| Předmět: |
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| Zdroj: |
Monthly Notices of the Royal Astronomical Society: Letters; Nov2018, Vol. 481 Issue 1, pL54-L58, 5p |
| Abstrakt: |
We present the detection of a bright 3 mm 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– |$100 {\mu {m}}$|, 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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