A Multi-Radio-Frequency Study of a RQQ

  • K. M. Blundell
  • M. Lacy
Conference paper
Part of the International Astronomical Union book series (IAUS, volume 175)


1821+643 is exceptionally bright at optical wavelengths with Mb ≈ −27 (Hutchings & Neff 1991), at a redshift of only 0.297. It is however, a radio-quiet quasar (RQQ) as can be demonstrated by considering e.g., the ratio of the luminosity in [OIII]λ5007 to the radio luminosity (Lacy, Rawlings, & Hill 1992). In contrast with other radio-quiet quasars however, E 1821+643 is located in a very rich cluster (Lacy et al. 1992) and is purported to reside in a gE host galaxy (Hutchings & Neff 1991). The full-resolution 8 GHz map is seen in Fig. 1. A bright unresolved core is seen with extended emission to the north-west (feature B). Features A and C are accurately diametrically opposed on either side of the core and therefore suggestive of jets; this is further supported by the alignment of features C, D and E.


Radiation Field Active Galactic Nucleus Radio Luminosity Rich Cluster Extragalactic Radio Source 
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Copyright information

© International Astronomical Union 1996

Authors and Affiliations

  • K. M. Blundell
    • 1
  • M. Lacy
    • 1
  1. 1.Oxford University AstrophysicsOxfordUK

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