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The jet and circumnuclear environment of 3C 293
(Astrophysical Journal, 2006-03-01)
We present the new HST near-infrared polarimetry, broad and narrow-band imaging,
and MERLIN 4.5GHz Multi-Frequency Synthesis radio imaging of 3C 293, a unique radio galaxy whose host is an obvious merger remnant, in an ...
The warped nuclear disk of radio galaxy 3C 449
(Astrophysical Journal, 2006)
Among radio galaxies containing nuclear dust disks, the bipolar jet axis is generally observed to be perpendicular to the disk major axis. The FR I radio source 3C 449 is an outlier to this statistical
majority, as it ...
Equatorial scattering and the structure of the broad-line region in Seyfert nuclei: Evidence for a rotating disc
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2005-05)
We present detailed scattering models confirming that distinctive variations in polarization across the broad Halpha line, which are observed in a significant fraction of Seyfert 1 galaxies, can be understood in terms of ...
High resolution studies of radio sources in the Hubble Deep and Flanking Fields
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2005-04)
Eighteen days of MERLIN data and 42 hours of A-array VLA data at 1.4 GHz have been combined to image a 10-arcmin field centred on the Hubble Deep and Flanking Fields (HDF and HFF). A complete sample of 92 radio sources ...
Seyferts on the edge: Polar scattering and orientation-dependent polarization in Seyfert 1 nuclei
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2004-05)
We have identified 12 Seyfert 1 galaxies that exhibit optical polarization spectra similar to those of Seyfert 2 galaxies in which polarized broad-lines are detected. We present new spectropolarimetric observations of 3 ...
Spectroscopy of the near-nuclear regions of Cygnus A: Estimating the mass of the supermassive black hole
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2003-07)
We use a combination of high spatial resolution optical and near-IR spectroscopic data to make a detailed study of the kinematics of the NLR gas in the near-nuclear regions of the powerful, FRII radio galaxy Cygnus A ...
A spectropolarimetric atlas of Seyfert 1 galaxies
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2002-09-27)
We present optical spectropolarimetry of the nuclei of 36 Seyfert 1 galaxies, obtained with the William Herschel and the Anglo–Australian Telescopes from 1996 to 1999. In 20 of these, the optical emission from the active ...
The evidence for jet-cloud interactions in a sample of high/intermediate-redshift radio galaxies
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2001-05)
We present detailed long-slit spectroscopic observations of a sample of four powerful
radio galaxies, with intermediate/high redshifts (0.47 < z < 0.81). The observations cover the rest-wavelength range 2600 °A- 6600 °A, ...
Testing the photoionization models of powerful radio galaxies: Mixed line-emitting media in 3C 321
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2000-10)
The photoionization models for the narrow emission line regions of powerful radio galaxies have yet to be tested in depth. To this end, we present high-quality long-slit spectroscopy of the powerful double-nucleus radio ...
PKS2250-41 and the role of jet-cloud interactions in powerful radio galaxies (full paper)
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 1999-02)
We present high resolution, long-slit spectra of the jet-cloud interaction in the powerful southern radio galaxy PKS2250-41.We have resolved the emission lines into two main kinematic components: a broad component (FWHM ...