Radio galaxy host properties spanning three dex in radio luminosity
New Astronomy Reviews 47:4-5 (2003) 187-191
Abstract:
We describe a major study of radio source host galaxies being carried out with the HST and ground-based facilities. Our sample is selected from 4 complete samples with different radio flux-density limits, giving a range of three orders of magnitude in radio luminosity at a fixed epoch (z=0.5). High-resolution HST WFPC2 imaging shows that all 44 radio galaxies have flux distributions well fit by an r1/4 law and lying on the Kormendy relation defined by lower redshift ellipticals with a shift in the zero-point to account for passive evolution. Spectroscopic follow-up enables stellar velocity dispersions to be determined and black hole masses estimated. The clustering environments of the radio galaxies are being probed via multi-colour wide-field imaging. Together, these data allow a detailed investigation of how factors such as clustering environment, close interactions and star-formation history affect the accretion rate, ionizing luminosity and jet production from supermassive black holes. © 2003 Elsevier B.V. All rights reserved.The host galaxies of flat-spectrum quasars
New Astronomy Reviews 47:4-5 (2003) 183-186
Abstract:
We present the results of deep VLT-ISAAC Ks-band imaging of four z∼1.5 flat-spectrum quasars selected from the Parkes half-Jansky flat spectrum sample. We find that the hosts of these flat-spectrum quasars are consistent with lying on the K-z Hubble relation for radio galaxies. This implies that the flat-spectrum quasar hosts fall in line with the expectations from orientation based unified schemes and also that they contain black holes of similar mass. Moreover, the width of the Hβ broad emission line in these objects tends to be narrower than in their misaligned (low-frequency selected quasar) counterparts, implying that the width of the Hβ broad emission line depends on source inclination, at least for radio-loud quasars, in line with previous studies. © 2003 Elsevier B.V. All rights reserved.Probing the absorbing haloes around two high-redshift radio galaxies with VLT-UVES
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 338:1 (2003) 263-272
The clustering of sub-mJy radio sources in the Bootes Deep Field
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 339:3 (2003) 695-700
The mass of radio galaxies from low to high redshift
ESO ASTROPHY SYMP (2003) 148-153