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Variability and Velocity of Superluminal Sources
M. H. Cohen, M. A. Russo, D. C. Homan +5
We investigate the relation between the Doppler factor determined from variations in total flux at 22 and 37 GHz, and the apparent transverse velocity determined from VLBA observat…
Superluminal Motion and Relativistic Beaming in Blazar Jets
K. I. Kellermann, M. L. Lister, D. C. Homan +5
High resolution radio observations remain the most direct way to study the formation and evolution of radio jets associated with the accretion onto massive black holes. We report p…
Kinematics of parsec-scale structures in AGN: the 2cm VLBA Survey
E. Ros, K. I. Kellermann, M. L. Lister +5
We are investigating the kinematics of jets in active galactic nuclei on parsec scales by studying a representative population of sources. This study is being carried out using the…
The NV/CIV ratio in high redshift radio galaxies
R. A. E. Fosbury, J. Vernet, M. Villar-Martin +3
Deep Keck spectropolarimetry has been obtained of a sample of powerful radio galaxies with . In addition to a clear 2200Ådust scattering/extinction signature and…
The structure and composition of high redshift radio galaxies
R A E Fosbury, J Vernet, M Villar-Martin +4
Keck spectropolarimetry, giving spectral coverage from Ly- to beyond CIII], and HST imaging of a sample of powerful radio galaxies with \ has been obtained. These data…
Optical continuum structure of Cygnus A
R. A. E. Fosbury, J. Vernet, M. Villar-Martin +4
As a prerequisite for interpreting new observations of the most distant radio galaxies, we make an optical study of the closest powerful radio source, Cygnus A. Using Keck imaging-…