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Numerical modelling of the lobes of radio galaxies in cluster environments
(2013-03-21)
We have carried out two-dimensional, axisymmetric, hydrodynamic numerical modelling of the evolution of radio galaxy lobes. The emphasis of our work is on including realistic hot-gas environments in the simulations and on ...
Giant lobes of Centaurus A radio galaxy observed with the Suzaku X-ray satellite
(2013-03-20)
We report on Suzaku observations of selected regions within the southern giant lobe of the radio galaxy Centaurus A. In our analysis we focus on distinct X-ray features detected with the X-ray Imaging Spectrometer within ...
Herschel-ATLAS/GAMA: A difference between star formation rates in strong-line and weak-line radio galaxies
(2013-03)
We have constructed a sample of radio-loud objects with optical spectroscopy from the Galaxy and Mass Assembly (GAMA) project over the Herschel Astrophysical Terahertz Large Area Survey (Herschel-ATLAS) Phase 1 fields. ...
Gas sloshing and radio galaxy dynamics in the core of the 3C 449 group
(2013-02-10)
We present results from a 140 ks Chandra/ACIS-S observation of the hot gas around the canonical FR I radio galaxy 3C 449. An earlier, shorter 30 ks Chandra observation of the group gas showed an unusual entropy distribution ...
Star formation in high-redshift quasars : Excess [Oii] emission in the radio-loud population
(2012-12-11)
We investigate the [O ii] emission-line properties of 18 508 quasars at z < 1.6 drawn from the Sloan Digital Sky Survey (SDSS) quasar sample. The quasar sample has been separated into 1692 radio-loud and 16 816 radio-quiet ...
Herschel-ATLAS : the far-infrared properties and star-formation rates of broad absorption line quasi-stellar objects
(2012-12-01)
We have used data from the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) at 250, 350 and 500 μm to determine the far-infrared (FIR) properties of 50 broad absorption line quasars (BAL QSOs)
Shocks, seyferts, and the supernova remnant connection : A chandra observation of the circinus galaxy
(2012-10-20)
We analyze new Chandra observations of the nearest (D = 4 Mpc) Seyfert 2 active galaxy, Circinus, and match them to pre-existing radio, infrared, and optical data to study the kpc-scale emission. The proximity of Circinus ...
The nature of the jet-driven outflow in the radio galaxy 3C305
(2012-08-11)
We present Chandra X-ray and Very Large Array radio observations of the radio galaxy 3C305. The X-ray observations reveal the details of the previously known extended X-ray halo around the radio galaxy. We show using X-ray ...
Rejuvenated radio galaxies J0041+3224 and J1835+6204 : how long can the quiescent phase of nuclear activity last?
(2012-08)
We present radio observations of two well-known doubledouble radio galaxies, J0041+3224 and J1835+6204, at frequencies ranging from 150 to 8460 MHz, using both the Giant Metrewave Radio Telescope and the Very Large Array. ...
What determines the properties of the X-ray jets in Fanaroff-Riley type I radio galaxies?
(2012-06-01)
We present the first large sample investigation of the properties of jets in Fanaroff-Riley type I radio galaxies (FR I) based on data from the Chandra archive. We explore relations between the properties of the jets and ...