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Host Galaxies of Radio-Loud & Radio-Quiet AGN

Published online by Cambridge University Press:  25 May 2016

M.J. Kukula ,
J.S. Dunlop ,
G.L. Taylor  and
D.H. Hughes
M.J. Kukula
Affiliation:
1 Institute for Astronomy - University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, U.K.
J.S. Dunlop
Affiliation:
1 Institute for Astronomy - University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, U.K.
G.L. Taylor
Affiliation:
2 Astrophysics Group - Liverpool John Moores University, Byrom St., Liverpool L3 3AF, U.K.
D.H. Hughes
Affiliation:
1 Institute for Astronomy - University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, U.K.

Extract

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A clear understanding of both the differences and similarities between the host galaxies of the three main classes of powerful active galaxy – radio-quiet quasars (RQQs), radio-loud quasars (RLQs) and radio galaxies (RGs) – is vital in any attempt to unify or relate the various manifestations of the AGN phenomenon. The unification of RLQs and RGs via orientation effects requires that the hosts of the two types be derived from the same population of galaxies. Meanwhile, the correlation between radio power and host morphology in nearby AGN, with radio-quiet objects (Seyferts) occurring in disc systems and radio-loud sources in ellipticals, is generally assumed to persist at higher redshifts and nuclear luminosities. However, in both cases the evidence remains ambiguous and, moreover, many previous studies have been based on poorly selected samples.

Type
Relation between Radio and Other Wavelenghts
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 248 - 249
Copyright
Copyright © Kluwer 1996 

References

Bahcall, J.N., Kirhakos, S. & Schneider, D.P. (1995), ApJ , 450, 486.Google Scholar
Dunlop, J.S., Taylor, G.L., Hughes, D.H. & Robson, E.I. (1993), MNRAS , 264, 455.CrossRefGoogle Scholar
Taylor, G.L., Dunlop, J.S., Hughes, D.H. & Robson, E.I. (1995), MNRAS, submitted.Google Scholar