74 citations · 264 across the 7 of their papers we have counts for
8 papers
MEM imaging of multi-wavelength VLBA polarisation observations of Active Galactic Nuclei
Colm P. Coughlan, Denise C. Gabzuda
We have developed a C++ implementation of the Maximum Entropy Method (MEM) suitable for deconvolving VLBI polarisation data. The first results of this implementation are presented…
Connecting Magnetic Towers with Faraday Rotation Gradients in Active Galactic Nuclei Jets
Mehreen Mahmud, Colm P. Coughlan, Eoin Murphy +2
The idea that systematic Faraday Rotation gradients across the parsec-scale jets of AGNs can reveal the presence of helical magnetic (B) fields has been around since the early 1990…
Analysing the Transverse Structure of the Relativistic Jets of AGN
E. G. Murphy, T. V. Cawthorne, D. C. Gabuzda
This paper describes a method of fitting total intensity and polarization profiles in VLBI images of astrophysical jets to profiles predicted by a theoretical model. As an example,…
Search for correlations between the optical and radio polarization of AGNs II: VLBA polarization data at 12+15+22+24+43 GHz
J. C. Algaba, D. C. Gabuzda, P. S. Smith
Previous research showed most BL Lac objects and some quasars have aligned VLBI-core and optical polarizations, although some of the AGNs also showed no obvious relationship betwee…
Investigating the Effects of Finite Resolution on Observed Transverse Jet Profiles
Eoin G. Murphy, Denise C. Gabuzda
Both the emission properties and evolution of Active Galactic Nuclei (AGN) radio jets are dependent on the magnetic fields that thread them. Faraday Rotation gradients are a very i…
Rotation-Measures across Parsec-scale Jets of FRI radio galaxies
P. Kharb, D. C. Gabuzda, C. P. O'Dea +2
We present the results of a parsec-scale polarization study of three FRI radio galaxies - 3C66B, 3C78 and 3C264 - obtained with the Very Long Baseline Array at 5, 8 and 15 GHz. Par…
Aligning VLBI Images of Active Galactic Nuclei at Different Frequencies
S. M. Croke, D. C. Gabuzda
Many important techniques for investigating the properties of extragalactic radio sources, such as spectral-index and rotation-measure mapping, involve the comparison of images at…
Frequency-dependent time delays for strong outbursts in four blazars from the Metsahovi and UMRAO monitoring databases
T. B. Pyatunina, N. A. Kudryavtseva, D. C. Gabuzda +4
The combined data of the University of Michigan Radio Astronomy Observatory and Metsahovi Radio Observatory provide us with radio light curves for Active Galactic Nuclei monitored…