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Herschel-ATLAS: The connection between star formation and AGN activity in radio-loud and radio-quiet active galaxies
(2015-10-01)
We examine the relationship between star formation and active galactic nuclei (AGN) activity by constructing matched samples of local (0 < z < 0.6) radio-loud and radio-quiet AGN in the Herschel-Astrophysical Terahertz ...
The LOFAR Multifrequency Snapshot Sky Survey (MSSS) : I. Survey description and first results
(2015-10-01)
We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky Low Frequency Array (LOFAR) imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. ...
Optical detection of the Pictor A jet and tidal tail : evidence against an IC/CMB jet
(2015-07-20)
New images of the FR II radio galaxy Pictor A from the Hubble Space Telescope reveal a previously undiscovered tidal tail, as well as a number of jet knots coinciding with a known X-ray and radio jet. The tidal tail is ...
Black hole masses, accretion rates and hot- and cold-mode accretion in radio galaxies at z ~ 1
(2015-02-21)
Understanding the evolution of accretion activity is fundamental to our understanding of how galaxies form and evolve over the history of the Universe. We analyse a complete sample of 27 radio galaxies which includes both ...
Internal entrainment and the origin of jet-related broad-band emission in Centaurus A
(2015-02-11)
The dimensions of Fanaroff-Riley class I jets and the stellar densities at galactic centres imply that there will be numerous interactions between the jet and stellar winds. These may give rise to the observed diffuse and ...
The cluster environments of radio-loud AGN
(Cambridge University Press, 2015)
Radio-loud AGN play an important role in galaxy evolution. We need to understand their properties, and the processes that affect their behaviour in order to model galaxy formation and development. We here present preliminary ...
The temperature dependence of the far-infrared-radio correlation in the Herschel-ATLAS
(2014-12-11)
We use 10 387 galaxies from the Herschel Astrophysical TeraHertz Large Area Survey (H-ATLAS) to probe the far-infrared radio correlation (FIRC) of star-forming galaxies as a function of redshift, wavelength, and effective ...
Spectral age modelling of the 'Sausage' cluster radio relic
(2014-12-01)
CIZA J2242.8+5301 is a post-core passage, binary merging cluster that hosts a large, thin, arc-like radio relic, nicknamed the 'Sausage', tracing a relatively strong shock front. We perform spatially resolved spectral ...
Numerical modelling of the lobes of radio galaxies in cluster environments II : Magnetic field configuration and observability
(2014-09-11)
We describe three-dimensional magnetohydrodynamical modelling of powerful radio galaxies in realistic poor cluster environments. This modelling extends our earlier work on the hydrodynamics of radio galaxies as a function ...
Filaments in the southern giant lobe of Centaurus A : Constraints on nature and origin from modelling and GMRT observations
(2014-08-21)
We present results from imaging of the radio filaments in the southern giant lobe of CentaurusA using data from Giant Metrewave Radio Telescope observations at 325 and 235 MHz, and outcomes from filament modelling. The ...