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Now showing items 11-17 of 17
Episodic radio galaxies J0116-4722 and J1158+2621 : Can we constrain the quiescent phase of nuclear activity?
(2013-04-11)
We present multifrequency radio observations of two well-known episodic Fanaroff-Railey type II (FR II) radio galaxies (J0116-4722 and J1158+2621) and a detailed investigation of the life cycle of episodic radio galaxies ...
Mining the Herschel-astrophysical terahertz large area survey : Submillimetre-selected blazars in equatorial fields
(2013-04-11)
The Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS) provides an unprecedented opportunity to search for blazars at sub-mm wavelengths. We cross-matched the Faint Images of the Radio Sky at Twenty-cm (FIRST) ...
Spectral properties of X-ray binaries in Centaurus A
(2013-04-01)
We present a spectral investigation of X-ray binaries (XBs) in NGC 5128 (Cen A), using six 100 ks Chandra observations taken over two months in 2007. We divide our sample into thermally and non-thermally dominated states ...
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 ...