Journal article

The host galaxies of radio-loud active galactic nuclei: The black hole-galaxy connection

M O'Dowd, CM Urry, R Scarpa

ASTROPHYSICAL JOURNAL | IOP PUBLISHING LTD | Published : 2002

Abstract

We have studied the host galaxies of a sample of radio-loud active galactic nuclei (AGNs) spanning more than 4 decades in the energy output of the nucleus. The core sample includes 40 low-power sources (BL Lac objects) and 22 high-power sources (radio-loud quasars) spanning the redshift range 0.15 ≲ z ≲ 0.5, all imaged with the high spatial resolution of the Hubble Space Telescope. All of the sources are found to lie in luminous elliptical galaxies, which follow the Kormendy relation for normal ellipticals. A very shallow trend is detected between nuclear brightness (corrected for beaming) and host galaxy luminosity. Black hole masses are estimated for the entire sample, using both the bulge..

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University of Melbourne Researchers