Quasars are more luminous than radio galaxies - so what?

Details Quasars are more luminous than radio galaxies - so what? Quasars are more luminous than radio galaxies - so what?

2003-01-07

arxiv.org/abs/astro-ph/0301098v1

New Astron.Rev. 47 (2003) 211-214

Astronomy and Astrophysics

Astrophysics

6 pages. To appear in "Radio galaxies: past, present and future", eds M. Jarvis et al., Leiden, Nov 2002

Scientific paper

10.1016/S1387-6473(03)00027-7

Surveys to find high-redshift radio galaxies deliberately exclude optically-bright objects, which may be distant radio-loud quasars. In order to properly determine the space density of supermassive black holes, the fraction of such objects missed must be determined within a quantitative framework for AGN unification. I briefly describe the receding torus model, which predicts that quasars should have more luminous ionizing continua than radio galaxies of similar radio luminosity, and present evidence to support it. I also suggest two further tests of the model which should constrain some of its parameters.

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