The nature of the variable millimetre-selected AGN in the brightest cluster galaxy of Abell 851

被引：1
|
作者：
Cheale, R. A. [1 ]
Geach, J. E. [1 ]
Edge, A. C. [2 ]
Perrott, Y. C. [3 ]
Cantwell, T. [4 ]
机构：
[1] Univ Hertfordshire, Sch Phys Astron & Math, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England
[2] Univ Durham, Dept Phys, Ctr Extragalact Astron, South Rd, Durham DH1 3LE, England
[3] Cavendish Lab, Astrophys Grp, 19 JJ Thomson Ave, Cambridge CB3 0HE, England
[4] Univ Manchester, Sch Phys & Astron, Jodrell Bank, Ctr Astrophys, Alan Turing Bldg, Manchester M13 9PL, Lancs, England
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 481卷 / 01期
基金：
美国国家航空航天局;
关键词：
techniques: interferometric; galaxies: clusters: individual: (A851; Cl; 0939+4713); galaxies: clusters: individual: Abell 851; galaxies: elliptical and lenticular; cD; galaxies: evolution; ACTIVE GALACTIC NUCLEI; SPECTRAL ENERGY-DISTRIBUTION; BLACK-HOLES; COSMOLOGICAL SIMULATIONS; RADIO-SOURCES; CL 0939+4713; FEEDBACK; VARIABILITY; CATALOG; FLOWS;
D O I：
10.1093/mnrasl/sly161
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 fiat, 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 fiat 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.
引用
收藏
页码：L54 / L58
页数：5
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