Journal Article

The radio—optical correlation in steep-spectrum quasars

Stephen Serjeant, Steve Rawlings, Stephen J. Maddox, Joanne C. Baker, Dave Clements, Mark Lacy and Per B. Lilje

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 294, issue 3, pages 494-504
Published in print March 1998 | ISSN: 0035-8711
Published online March 1998 | e-ISSN: 1365-2966 | DOI:
The radio—optical correlation in steep-spectrum quasars

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Using complete samples of steep-spectrum quasars, we present evidence for a correlation between radio and optical luminosity which is not caused by selection effects, nor caused by an orientation dependence (such as relativistic beaming), nor a by-product of cosmic evolution. We argue that this rules out models of jet formation in which there are no parameters in common with the production of the optical continuum. This is arguably the most direct evidence to date for a close link between accretion on to a black hole and the fuelling of relativistic jets. The correlation also provides a natural explanation for the presence of aligned optical/radio structures in only the most radio-luminous high-redshift galaxies.

Keywords: accretion, accretion discs; black hole physics; galaxies: active; galaxies: jets; quasars: general

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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