Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-30T05:49:59.011Z Has data issue: false hasContentIssue false

A Multi-radio-frequency Study of a RQQ

Published online by Cambridge University Press:  25 May 2016

K.M. Blundell
Affiliation:
1 Oxford University Astrophysics - Keble Road, Oxford, 0X1 3RH, U.K.
M. Lacy
Affiliation:
1 Oxford University Astrophysics - Keble Road, Oxford, 0X1 3RH, U.K.

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

1821+643 is exceptionally bright at optical wavelengths with M B ≈ −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.

Type
Properties of Radio Sources
Copyright
Copyright © Kluwer 1996 

References

Blundell, K.M. & Lacy, M., 1995, MNRAS , 274, l9 CrossRefGoogle Scholar
Blandford, R.D., 1990, in Courvoisier, T.J.-L., Mayor, M., eds, Active Galactic Nuclei. Springer-Verlag, Berlin, p. 161 CrossRefGoogle Scholar
Daly, R.A., 1992, ApJ , 399, 426 CrossRefGoogle Scholar
Hutchings, J.B. & Neff, S.G., 1991, AJ , 101, 2001 Google Scholar
Lacy, M., Rawlings, S., Hill, G.J., 1992, MNRAS , 258, 828 Google Scholar
Kolman, M., Halpern, J., Shrader, C.R., Filippenko, A.V., 1991, ApJ , 373, 57 CrossRefGoogle Scholar