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Design concepts for the Cherenkov Telescope Array CTA : An advanced facility for ground-based high-energy gamma-ray astronomy
(2011-12-01)
Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes. Ground-based gamma-ray astronomy has a huge potential in ...
The Dynamics of Radio Galaxies and Double-Double Radio Galaxies
(2011-12)
Relativistic and magnetized plasma ejected by radio loud AGNs through jets form the diffuse lobes of radio galaxies. The radiating particles (electron/electron-positron) in lobes emit in radio via the synchrotron process ...
The Suzaku view of the disk-jet connection in the low-excitation radio galaxy NGC 6251
(2011-11)
We present results from an 87 ks Suzaku observation of the canonical low-excitation radio galaxy (LERG) NGC6251. We have previously suggested that LERGs violate conventional active galactic nucleus unification schemes: ...
Herschel-ATLAS: the link between accretion luminosity and star formation in quasar host galaxies
(2011-09)
We use the science demonstration field data of the Herschel Astrophysical Terahertz Large Area Survey to study how star formation, traced by the far-infrared Herschel data, is related to both the accretion luminosity and ...
Clear detection of dusty torus signatures in a weak-line radio galaxy: the case of PKS 0043-42
(2011-06)
We report the clearest detection to date of dusty torus signatures in a weak-line radio galaxy (WLRG). The deep Spitzer InfraRed Spectrograph (IRS) rest-frame mid-infrared (MIR) spectrum of the WLRG PKS 0043-42 (z = 0.116) ...
Modelling TeV gamma-ray emission from the kiloparsec-scale jets of Centaurus A and M87
(2011-03-09)
The widespread detection of synchrotron X-ray emission from the jets of low-power, nearby radio galaxies implies the presence of electrons at and above TeV energies. In this paper we explore the possibility that the TeV ...
The dynamics and environmental impact of 3C452
(2011)
We present a detailed analysis of a new XMM-Newton observation of the Fanaroff-Riley type II (FR II) radio galaxy 3C452 and its environment. We detect X-ray emission from the hot intragroup medium and measure its temperature ...
Markarian 6 : shocking the environment of an intermediate Seyfert
(2011)
Markarian 6 is a nearby (D ~ 78 Mpc) Seyfert 1.5, early-type galaxy, with a double set of radio bubbles. The outer set spans similar to 7.5 kpc and is expanding into the halo regions of the host galaxy. We present an ...
The gas dynamics of NGC 4472 revealed by XMM-Newton
(2011)
We present results from a 100 ks XMM-Newton observation of the hot gas in the Virgo cluster elliptical galaxy NGC 4472. We find a surface brightness discontinuity ∼21 kpc north of the nucleus, consistent with being a contact ...
Revealing the gamma-ray jet in a black hole binary
(2011)
An important advance in high-energy astrophysics over the past decade has been the detailed understanding of the nature of binary stellar systems in which material from an ordinary star is being accreted on to a compact ...