136 citations · 575 across the 10 of their papers we have counts for
10 papers
LOFAR imaging of Cygnus A -- Direct detection of a turnover in the hotspot radio spectra
J. P. McKean, L. E. H. Godfrey, S. Vegetti +75
The low-frequency radio spectra of the hotspots within powerful radio galaxies can provide valuable information about the physical processes operating at the site of the jet termin…
On the population of remnant FRII radio galaxies and implications for radio source dynamics
L. E. H. Godfrey, R. Morganti, M. Brienza
The purpose of this work is two-fold: (1) to quantify the occurrence of ultra-steep spectrum remnant FRII radio galaxies in a 74 MHz flux limited sample, and (2) perform Monte-Carl…
Mutual distance dependence drives the observed jet power - radio luminosity scaling relations in radio galaxies
L. E. H. Godfrey, S. S. Shabala
The kinetic power of radio jets is a quantity of fundamental importance to studies of the AGN feedback process and radio galaxy physics. A widely used proxy for jet power is the ex…
LOFAR discovery of a 700-kpc remnant radio galaxy at low redshift
M. Brienza, L. Godfrey, R. Morganti +13
Remnant radio galaxies represent the final dying phase of radio galaxy evolution, in which the jets are no longer active. Due to their rarity in flux limited samples and the diffic…
A survey of X-ray emission from 100 kpc radio jets
Daniel A Schwartz, Herman L Marshall, Diana M Worrall +8
We have completed a Chandra snapshot survey of 54 radio jets that are extended on arcsec scales. These are associated with flat spectrum radio quasars spanning a redshift range z=0…
A Deep Chandra ACIS Survey of M83
Knox S. Long, Kip D. Kuntz, William P. Blair +5
We have obtained a series of deep X-ray images of the nearby galaxy M83 using Chandra, with a total exposure of 729 ks. Combining the new data with earlier archival observations to…
Size dependence of the radio luminosity - mechanical power correlation in radio galaxies
Stanislav Shabala, Leith Godfrey
We examine the relationship between source radio luminosity and kinetic power in Active Galactic Nucleus (AGN) jets. We show that neglecting various loss processes can introduce a…
The microarcsecond structure of an AGN jet via interstellar scintillation
J. -P. Macquart, L. E. H. Godfrey, H. E. Bignall +1
We describe a new tool for studying the structure and physical characteristics of ultracompact AGN jets and their surroundings with microarcsecond precision. This tool is based on…
AGN Jet Kinetic Power and the Energy Budget of Radio Galaxy Lobes
L. E. H. Godfrey, S. S. Shabala
Recent results based on the analysis of radio galaxies and their hot X-ray emitting atmospheres suggest that non-radiating particles dominate the energy budget in the lobes of FRI…
An X-ray Imaging Survey of Quasar Jets -- Testing the Inverse Compton Model
H. L. Marshall, J. M. Gelbord, D. A. Schwartz +7
We present results from continued Chandra X-ray imaging and spectroscopy of a flux-limited sample of flat spectrum radio-emitting quasars with jet-like extended structure. X-rays a…